Answer:
B.ocean trench
Explanation: When tectonic plates slide against each other one overlaps the other.
The answer is B)Atmosphere
Answer:
Salinity in an estuary varies according to one's location in the estuary, the daily tides, and the volume of fresh water flowing into the estuary. In estuaries, salinity levels are generally highest near the mouth of a river where the ocean water enters, and lowest upstream where freshwater flows in.
Explanation:
False because many different species are going extinct within our lifetime
