Limestone is a type of rock that forms when igneous; magma cools igneous; lava cools sedimentary; calcium carbonate precipitates, or organic material containing calcium carbonate accumulates in a water environment sedimentary; broken fragments of rock are deposited in a water environment and are then cemented together.

answer: 2

explanation:

yes

enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.