What is C6H1200 for photosynthesis

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.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?