U-boats were used primarily to
О
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gather information about enemy movements by tracking warships.
O protect the German coast from attack by Allied ships and submarines.
resupply troops with guns, ammunition, and food via sea rather than land.
O target Allied shipments on passenger ships, warships, and merchant ships.

there is 2 main differences, basically which are the users and the market. the other difference is the kind of content

people who use tik tok are mainly people from east asia, kind of like the app douyin. musically, on the other hand, are used by people from america or european countries.

while tik tok videos show things like daily life videos, comedy, or just funny videos, musically are like people mimicking songs with their own actions, 'imitate' singers and video clips.

hope this !

answer: d

explanation:

characteristic of bad weather