Drawing Conclusions At first, the United States remained neutral inWorld War I. Why was unrestricted submarine warfare an important factor in causing the United States to enter the war?

On February 1, 1917, the lethal threat of the German U-boat submarine raises its head again, as Germany returns to the policy of unrestricted submarine warfare it had previously suspended in response to pressure from the United States and other neutral countries.

Explanation:

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well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.