An organism is a living thing.
So the correct answer is C.
Because it’s closer to the sun
The unsuitable factors for forming is '' salt,paints,poisnes substances,etc"

<u>There are three main types of reservoirs; valley-dammed reservoirs, bank-side reservoirs, and service reservoirs. Valley-dammed reservoirs are created in valleys between mountains. Usually, there is an existing lake or body of water.</u>
The answer is C
Hope this helps