What features of ice layers helps us understand Earth's past climate?

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates