Red and green can add up to white because they are complementary colors. When red and green light are combined, they stimulate all three types of color receptors in the human eye, which results in the perception of white light. This phenomenon is known as additive color mixing, where different colors of light are combined to create new colors. In the case of red and green, their combination results in the perception of white due to the way our eyes and brain process the incoming light signals. **

Red wine is typically bottled in green bottles because the green glass helps to protect the wine from light exposure, which can cause it to spoil or become "light struck." White wine, on the other hand, is often bottled in clear or light-colored bottles to showcase its color and clarity. Additionally, the color of the bottle can also be a marketing choice, as the green bottle has become associated with red wine and the clear or white bottle with white wine. **

The zebra crossing is white because it provides high visibility for both pedestrians and drivers. The contrast of the white stripes against the black asphalt makes it easier for drivers to see pedestrians crossing the road, especially in low light conditions. Additionally, white is a universal color for road markings, making it easily recognizable and understood by people from different countries and cultures. Using red or green for the zebra crossing could cause confusion as these colors are typically associated with traffic signals and may not convey the same message of pedestrian right of way. **

The Italian flag has the colors green, white, and red because these colors were chosen to represent different aspects of the country. The green represents the country's plains and hills, the white symbolizes the snow-capped Alps, and the red signifies the bloodshed during the Italian independence wars. The flag was officially adopted in 1946 after the end of World War II. **

The flashing, red, green, and white object in the sky is most likely an airplane. The red and green lights are wingtip navigation lights, while the white light is typically the aircraft's tail light. These lights help other aircraft identify the direction the plane is flying and its position in the sky. **

The blinking, red, green, and white object in the sky is most likely an airplane. The red and green lights are positioned on the wings of the aircraft and are used to indicate the direction the plane is traveling. The white light is typically located on the tail of the plane and is used to make the aircraft more visible to other pilots. The blinking lights are part of the plane's navigation and anti-collision system, helping to ensure safe travel through the skies. **

Red clay gets its color from iron oxide, which is present in the soil. The iron oxide gives the clay a reddish hue. White clay, on the other hand, is usually caused by the presence of kaolin, a mineral that is light in color. The different colors of clay are a result of the varying mineral compositions in the soil where the clay is formed. **

A green-red fruit with white spots is likely a strawberry. Strawberries are typically red when ripe, but can have green or white spots on their surface. They are a popular fruit known for their sweet flavor and versatility in both sweet and savory dishes. **