The incidence of skin cancer has increased dramatically in parts of Australia where people are experiencing greater UV exposure as a result of:

As a result of the increase in the hole in the ozone layer.

Explanation:

As you may already know, the ozone layer is a very simple and delicate layer that settles around the earth and protects living beings from ultraviolet rays, which can be very harmful to health. However, this layer has been constantly degraded due to the great pollution and the emission of gases that promote holes in it. As a result, some regions experience a high incidence of ultraviolet rays, which can cause an increase in skin cancer.

the answer is:

c. islam and christianity

explanation:

islam and christianity are widely practiced in africa. islam is practiced due to its spread from the middle east into africa, and christianity is practiced due to the colonization of africa by the british empire.