Someone help me on this one plz

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

What is the mass of 0.46 mol of mgcl2

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !