Atoms of which element can bond to each other to form chains, rings, and networks?
(1) carbon (3) hydrogen
(2) fluorine (4) oxygen

It's the Carbon. 
Because Carbon is tetravalent, and can have 4 bonds. 
While Oxygen is bivalent and can have 2 bonds, and fluorine and hydrogen is monovalent and can have 1 bond.

Hope this Helps :)

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.