Just like convection in air, when denser water sinks, its space is filled by less dense water moving in. This creates convection currents that move enormous amounts of water in the depths of the ocean.
Can you attach a picture maybe?
The term that takes into consideration "how humans adapt to and modify the environment is human-environment interaction. Correct answer:C
The term denotes the interactions between the human social system and his environment (the erst of the ecosystem). These interactions include how humans depend on the environment, how humans modify the environment and the way humans adapt to the environment.