Question

in winter, although many parts of europe have heavy snow falls, the sea ports remain ice - free and ships come and go. what could be a reason why the sea ports remain ice - free?
a a warm ocean current flows along the coast.
b a cold ocean current flows along the coast.
c the coastal regions have very moderate winters.
d warm winds blow from the continent, melting the ice.

Explanation:

To determine why European seaports remain ice - free in winter, we analyze each option:

• Option A: A warm ocean current (like the North Atlantic Drift) along the coast can transfer heat, preventing ice formation. This is consistent with the effect of warm ocean currents on coastal climates.
• Option B: A cold ocean current would cool the water and likely promote ice formation, so this is incorrect.
• Option C: Stating that coastal regions have moderate winters is a result, not a cause of the seaports being ice - free.
• Option D: Winds from the continent are usually cold in winter and would not melt ice; instead, they might bring cold air and promote freezing.

Answer:

A. A warm ocean current flows along the coast.