Question

which part of a telescope focuses the incoming light?
objective lens
magnifier
mirror
aperture
question 4
the process of upwelling brings which of the following to the surface?
cold water
freshwater
deoxygenated water
warm water

Explanation:

• For the telescope question: The objective lens (in refracting telescopes) or mirror (in reflecting telescopes) focuses incoming light. Among the given options, "objective lens" is a valid focusing component. Magnifiers are for magnification, and aperture is related to light - gathering ability (size of the opening), not focusing.
• For the upwelling question: Upwelling is a process where deep, cold, nutrient - rich water rises to the surface. Cold water is denser and typically found in deeper ocean layers. Freshwater is not a result of upwelling (ocean upwelling occurs in saltwater). Deoxygenated water is not characteristic of upwelling (upwelled water can bring nutrients and oxygen - rich water in some cases). Warm water is usually at the surface (due to solar heating), and upwelling brings cold water from below.

Answer:

1. objective lens
2. cold water