What is the land area from which a stream gets its water ?

Drainage basin. the land area from which a stream gets its water, also called a watershed.
Hope this helped ^^

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.