Step 1: Understanding Ecology.
Ecology is the scientific study of interactions between organisms and their environment, including the distribution and abundance of organisms.
Step 2: Focus of Ecology.
Ecology focuses on the relationships between organisms and the biotic and abiotic components of their environment.
Step 3: Conclusion.
Thus, the correct answer is ((C) Ecology.
Final Answer:
\[
\boxed{\text{Ecology}}
\]