Answer: because the enemy would have to cross the heavily guarded sea to get there.
Explanation: In his speech given in 1940 Churchill said that an invasion of Britain was difficult because the enemy would have several obstacles from the British Navy. The enemy would need a large army to cross the English channel and it would be intercepted before achieving its goal. That was why, for Churchill, it was not likely to happen.
Your audience would be the teacher or whoever is grading you, because the purpose of a critical analysis as to examine your point of you of the topic and how you structure of the essay based off of your opinions and possibly facts
