Definition: This is the regular progression of species replacement that occurs after a disturbance, such as natural disaster, or during the establishment of a new habitat.

Example: primary and secondary

Ecological succession

Explanation:

Ecological succession can be described as a series of processes by which a climax community arises gradually in an area where there was no form of life before or the previous ecosystem was destroyed bu disasters such as fire, flood etc.

Ecological succession is of two types:

Primary succession occurs on lands where there was no form of life before. On the other hand, secondary succession occurs in lands where there was an ecosystem before which was destroyed.

hello there the answer is d

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.