Answer:
Britain was an island nation dependent on trading to keep its economy strong.
Step-by-step explanation:
Throughout the Second World War, Great Britain required to import raw materials, food, weapons and other things that were essential to the war effort. Since much of these goods reached across the Atlantic from the Americas and the remaining come either through the Suez Canal to Britain or nearby South Africa then by the South and then North Atlantic to Great Britain. Therefore, the control of the Atlantic Ocean was essential for Britain to ship in the resources to sustain the war due to German U-boat and exterior submarine movements.