Because they knew that Germans could sink any ship they want. They could sink civilian ships. Back then, the only way to travel long distances was by boat, because passenger airplanes had not been invented. The Germans could now sink them if they wanted to travel somewhere, so they either risk their life or not go on trips.
This is the answer I hope I could help you!:)
Answer:
Mudras help to link the brain to the body, soothe pain, stimulate endorphins, change the mood and increase our vitality. Mudras have been an integral part of many Hindu and Buddhist rituals. They are used extensively in Yoga, meditation and dance.
Explanation:ther you go