Answer:
The biologist is studying about the ecological community.
Explanation:
The ecological community refers to the community in which population of different types of species survives together. As the biologist is observing about the interaction of different populations of Pennsylvania region, it can be inferred that the he is studying about the ecological community of Pennsylvania region.
The population surving in the community interact with each other through different modes of interaction. It may either parasitic, or mutual, or competitive or predication or commercialism.
The answer is true because the top of the list would be the selection sorr
the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms.
The roots need all the water it can get but sense theres water in the ground it already has water which transports water to the leaves
