Amajor problem caused by humans is the contamination and depletion of resources.

A major problem caused by humans is the contamination and depletion of natural resources.

Explanation:

A resource is depleted when it is being consumed at a faster rate than being produced. Natural resources are the resources which are present in the environment and no human effort is made in producing them. They are produced by nature. They can either be renewable or non- renewable.

The major threats to the environment caused by humans include deforestation, oil depletion, minerals depletion, water depletion, making of nuclear weapons, pollution of water and environment.

natural

Explanation:

Humans have been exploiting the natural resources since the start of human evolution.

Human have started clearing the forest in order to accommodate themselves by building residential buildings and townships. In order to do business and earn wealth , he started developing more and more infrastructure and commercial areas.

Humans have overused naturally occurring fossils such as petroleum, coal, natural gas etc. They have exploited flora and fauna to an extent of devastation. They polluted the essential resources like water, air and land.

Hence, A major problem caused by humans is the contamination and depletion of natural resources.

the answers are a and c