Standard temperature and pressure are defined as a) 0 k and 1 kpa b) 0°c and 101.3 kpa c) 0 k and 101.3 kpa d) 0°c and 1 kpa

The answer is B) 0°C and 101.3 kPa 

Just so you know, 0 C is the same as 273 K and 101.3 kPa is the same as 1 atm

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.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).