Question

multiple-choice question
viruses can be vectors for genetic engineering because
they deliver genes that we want into different cells
they infect organisms with diseases that we want to study
they remove genes from our cells that we can use

Explanation:

Genetic engineering vectors are used to transfer target genetic material into host cells. Viruses naturally insert their genetic material into host cells, so they can be modified to carry desired genes instead of their own harmful ones, delivering these genes into target cells. The other options describe unrelated or incorrect functions for viral vectors in genetic engineering.

Answer:

they deliver genes that we want into different cells