Answer:
cause tumors to develop.
Explanation:
Oncogenic viruses are viruses that do not kill or lyses the cells of the host outright but has the capacity to cause to cause a long term infections that may eventually lead to the formation of tumor or cancerous cells within the body of their hosts.
<em>Hence, the fourth option is the correct option. That is, they cause tumors to develop</em>
You need to give context to this question..... or a picture.....
Sedimentary rocks are most likely to find layers
Anton van Leeuwenhoek :-))