What is the function of a chloroplast in a cell? a. it controls the water content. b. it provides support and protection. c. it converts light energy into chemical energy. d. it breaks down waste materials

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!