Yes it might be C, but it's kinda wierd that you call the prey a resource.
but most probably it's C
Answer:
D) Some ancestors of Homo sapiens have not yet been identified.
The microscope could distinguish objects that were more than 1 micrometer apart
D) cell membrane is the anwser
A eutrophic stream, river or lake occurs when too many nutrients, like nitrogen and phosphorous, are present, usually as a result of runoff from the surrounding land. Algae, plankton and other microorganisms love these types of nutrients, and when they are plentiful, these aquatic organisms can take over