Which is the correct answer Please help now :(

If dotted line is line B than the answer would be a. The enzymes reduced the activation energy required.

Explanation:

If the solid line is line B then the answer is something along the lines of answer b.

The diversity of species and genes in ecological communities affects the functioning of these communities. ... The two main areas where the effect of biodiversity on ecosystem function have been studied are the relationship between diversity and productivity, and the relationship between diversity and community stability.