Answer:
B
Explanation:
Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.
It's A. Temperature changes modify the enzyme shape, so they no longer fits.
Controlled burning? I think that's right.
D: food availability for the moose and disease for the wolf
