Respuesta :
The answer that makes the most sense to me is A. human environment interaction because they're studying what the logging industry, which is a human action, affects the rainforest, which is an environment.
The answer is:
A. human-environment interaction
Logging industry cuts and sells trees from the woods, the rainforest, and other places where trees grow largely, in this case is a human-enviroment interaction, in the case of the rainforest companies usually do not re-forest what they cut making changes in the ecosystem.