"coastal cities in england experience milder weather in the winter than they would expect at that latitude. they are affected by the gulf stream current. which explanation matches the phenomenon of the gulf stream affect? "

Coastal cities in England tend to experience milder weather in the winter than one would expect for that area, this is due to the gulf stream current. The Gulf Stream Current means that the warm water in the ocean current warms the air above it, then that warmer air is blow on the shore which helps to warm these coastal towns up a bit.

I believe that this question has multiple questions and the answer should be;The warm water of the current warms the air above it. Prevailing winds blow the warm air toward shore. 

The gulf stream current carries warm water in the Atlantic ocean to the northern Europe. Winds from the Arctic cools the surface water in the north arctic, making it more salty. Essentially, water with a high level of salt drops easily to the ocean floors. Cold water travelling towards equator warms slowly and vast oceanic current found on the surface of the Atlantic ensures England's mild winters.