The answer is A. Excretion I hope this helps
Producers,consumers,and decomposers are linked because they all have to work together to stay alive the produces will make the energy inside itself then the consumers will eat it then have all the energy the plant had then the consumer will die and the decomposer will beak it down and eat what remains of the animal
i hoped this helped :)
I think it is skin cells and blood cells because sperm and egg cells are haploid, so they only have one copy. I’m honestly not 100% sure tho