What causes lunar phases?

 The moon phase name is shown alongside the image. The dotted line from the earth to the moon represents your line of sight when looking at the moon. So the basic explanation is that the lunar phases are created by changing angles (relative positions) of the earth, the moon and the sun, as the moon orbits the earth.

Explanation:

the moon phase name is shown alongside the image. The dotted line from the earth to the moon represents your line of sight when looking at the moon. So the basic explanation is that the lunar phases are created by changing angles (relative positions) of the earth, the moon and the sun, as the moon orbits the earth.

Explanation:

answer: d

explanation:

answer: b (host)

viruses use the cells of living organisms to reproduce. the cell which is used by virus is called as "host cell". it is a living cell in which virus multiplies, example bacteria, plant or an animal cell.

in this, the virus is a parasite, which uses host cell for its benefit (reproduction) by using the cell machinary of host cell.