Question

1. two common causes of viruses are opening an infected and clicking on websites or downloads that contain a virus. email website drawer window

Explanation:

Viruses can be spread through various digital means. One common way is via infected emails. When an email has a virus attached (either as an attachment or within the email's code), opening it can introduce the virus to the user's system. Websites or downloads with viruses are also a well - known source. The other options, "website" is already mentioned in the second part of the description about virus sources (clicking on websites), "drawer" and "window" are physical or software - interface elements (in a non - digital virus - spreading context) that are not relevant to virus transmission in the described digital sense.

Answer:

email