Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.
Chlorophyll breaks down.
Explanation: In fall, there are changes in the daylight and temperature. This causes the leaves to stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall color.
The 2nd one is a fact, the 3rd one is a question, and the last one is a fact. Only the first one is an assumption based on an observation.
the answer would be knowledge about cars!