Describe what happens in a nuclear fusion reaction.

It gets squeeze together so tightly that four hydrogen nuclei combine to form one helium atom. This is called nuclear fusion. In the process some of the mass of the hydrogen atoms is converted into energy in the form of light. The same processoccurs in thermonuclear (fusion) bombs.

The correct answers are A) Industrial waste. C) Sewage disposal. D) Runoff.

The types of pollution in the Great Lakes that human activity has caused are "industrial waste, sewage disposal, runoff."

Human activity has represented severe damage to the environment. In the case of the Great Lakes in, those above-mentioned reasons have causes of pollution for an important source of fresh water in the United States. These are the largest lakes in the country and are the Lake Michigan, Lake Uron, Lake Superior, Lake Ontario, and Lake Eire.