The climate of western europe is mostly a. sub-tropical. b. temperate. c. tropical. d. arctic.

The climate of Western Europe is influenced mainly by its latitude (northerly position) on the globe. Its geographic position is north of the equator, so it is not tropical or sub-tropical, but not so far north as to be very cold year around, so it not arctic either. 

Western Europe experiences seasons, with warmer weather in the summer and colder weather in the winter. The climate of Western Europe is best described as:
 
B) temperate

answer:

the significant threats to water quality in the united states are industrial pollution, sewage pollution, and water from the sea that is salty.