Atoms of which pair of elements will form covalent bonds in a compound? Na and Al
Ag and Ca
I and F
Be and Cl

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

Where are they though?

To wear the full equipment.