What pigment decreases in plants during autumn, making them lose their green color?

I work best on a deadline so I start projects close to their due date.

A.) Chloroplast

A.) Chloroplast

I work on the tasks that I enjoy most first.

B.) Chlorophyll

B.) Chlorophyll

I work on the tasks that I enjoy most first.

C.) Chloroform

C.) Chloroform

I work on the tasks that I enjoy most first.

D.) Xanthophyll

D.) Xanthophyll