B. community
hope this helps;)
Methods or procedures that are used to study living things.
Answer:
Temperature: Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range.
Explanation:
The answer is to your question my friend is D.
Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.