<span>Cytoplasm, DNA, cell membrane, and vacuole</span>
Answer:
I believe the answer is A) energy pyramid
Explanation:
It's talking about trophic levels, as opposed to individual organisms.
The best way would be DNA
For the 1st one I would say C as it says Cells are the smallest form of life, for the 2nd one I would say C because the others all have animal which doesn't have cell wall, 3rd is A
Used by American pioneers living in the Great Plains in the 19th century. The emigrants traveled by wagon in search of fertile land in Oregon's Willamette Valley.