13 is bass but I’m not sure what 14 is
Blood vessels expand during hot weather and retract/ tighten in cold weather
The given statement is False.
For a source of water pollution the pollutant can be any undesirable substance present in water.
These undesirable substances can be biological, physical or chemical.
Biological substances such as harmful microorganisms or physical substances such as plastic, garbage and other substances present in water can also be considered as the water pollution.
The chemicals, and other substances are considered as the source of water pollution.
The answer is a Vagus Nerve.
This this the answer right here
