I think the answer you’re looking for is
D. Carbon, hydrogen, and oxygen
-I hope this helps! Enjoy the rest of your day
Color I believe because if a diamond was the same color as coal(black) you couldn’t tell a difference
Boy you are off the charts gorgeous, I would rate you a 69
It is A. Those are all decomposers, the other answers like C are all animals. Decomposers are are biotic organisms that break down basically dead plants or animals.