2) List one way viruses can be helpful.

In fact, some viruses have beneficial properties for their hosts in a symbiotic relationship (1), while other natural and laboratory-modified viruses can be used to target and kill cancer cells, to treat a variety of genetic diseases as gene and cell therapy tools, or to serve as vaccines or vaccine delivery agents.

Explanation:

Viruses, like bacteria, can be important beneficial microbes in human health and in agriculture.