A medium. Like water or air or a brick wall.
Answer:
letters b and d don't define the cell theory
It's C.
All chemical reactions will always need activation energy.
I'm gonna say D is the answer.
<span>An oceanographer would be most likely to study how whales are affected by pollution. An Oceanographer is a scientist that studies all aspects,physical and biological that pertain to the ocean. The topic of whales and pollution can fit under the study of ocean ecosystem dynamics which falls under the large umbrella of oceanography.</span>