I don't really know what you define as an underwater cave.
Some caves have been drowned by rising sea-level, having formed on land at times of lower sea-levels (i.e. during the Ice Age glacials). Others are entirely terrestrial but full in whole or in part with water.
Nevertheless, the answer is that normally caves carry water from limestone uplands to their outlet (risings or springs) at lower altitude, so their effect is to replace open streams on the surface with underground ones.Other than that or the occasional collapse of a cave roof to create a doline on the ground above, they don't affect the land surface.
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The higher you go the less effect gravity has on you.
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greenhouse effect
Primarily by diverting any surface streams and run-off water they intercept, underground. Otherwise, none.... unless a passage roof collapses and forms a doline.
They both can change the size of Earths Surface
yes
It doesnt effect the earths surface, it affects the the earth surface by expanding cracks in the ground.
lava effects the earths surface by destroying it and building it up
the greenhouse effect!
they affect by the sand
By slowing down the earths rotation but will not make effect to humans .
it is cars trucks and buses.
jayde and metal
an active volcano affects the surface because of where the place is located
greenhouse effect
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