I'm going with C. It may be wrong but I think it's C.
Its often referred to as the colon
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.
Answer:
O weather, climate
Explanation:
A local area's short-term atmospheric conditions are known as weather while long term conditions are known as climate.
I hope this helped :)
Answer:
A
Explanation:
The Himalayas is formed by two plates collide each other