I think the answer you’re looking for is
D. Carbon, hydrogen, and oxygen
-I hope this helps! Enjoy the rest of your day
It’s the first choice because the C at the end does not pair with anything, it was an extra pair that was made
Answer:
A biogeochemical cycle is one of several natural cycles, in which conserved matter moves through the biotic and abiotic parts of an ecosystem. ... Each of these elements is circulated through the biotic components, which are the living parts of an ecosystem, and the abiotic components, which are the non-living parts.
The awnser is the last one
What substances are involved in controlling the production of sperm and eggs in humans? Hormones.
