Is the science of observing and describing organisms in their environment paired with experimental science.

a. natural history
b. environmental science
c. ecology
d. conservation biology

( a is wrong)

When studying organisms and their environment, we observe how the organisms interact with one another, for example, in predator-prey relationships, and we investigate how these organisms interact with the environment around them. The systems these interactions form are called ecosystems and the study of these ecosystems is called ecology.