What natural phenomenon ebbs and flows, influenced by unseen forces yet profoundly affects our shores?

Category: Knowledge · Difficulty: expert

Hint: This event is heavily influenced by the moon's gravitational pull.

Answer

Ocean tides

Explanation

Ocean tides result from the gravitational pull of the moon and the sun, affecting coastal ecosystems.

This is a expert knowledge riddle — one of the harder riddles here. The answer is Ocean tides.

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