Algal blooms can result in a cloudiness called , which can reduce the penetration of sunlight.

There are no options to this question, however, the answer is:

TURBIDITY

Explanation:

Algal bloom is a term used to describe the excessive and rapid growth of algae species on a water surface. It is caused by the pollution of a water body with nutrients, in a process called EUTROPHICATION.

Asides the low oxygen effect of this algal blooming on a water body, it can also form a cloudiness on the surface of the water body. This cloudiness causes the water to be unclear in a process that is called TURBIDITY. In other words, the water that is affected by algal bloom is said to be "TURBID" and can reduce the penetration of sunlight.

not too sure but maybe in the hot springs.