Which is composed of alkenes?
welding torch fuel
polystyrene cups
gasoline
synthesized dyes

Alkenes are a class of organic substances with a double carbon-carbon bond. These organic substances are prepared from alkanes by a process named as thermal cracking. Alkenes are common raw materials for the production of a number of plastics like polypropylene, polystyrene, polyethylene and PVC. Thus, the answer for this are polystyrene cups.

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.