Why does earth have a better environment for life than venus or mars

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

Which measure of humidity, relative humidity or dew point, best describes the actual quantity of water vapor in a mass of air

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