Ijust need these two questions and im !

1. at which point will a cloud form?

a) when the temperature of the rising air rises above the dew point

b) when the temperature of the rising air falls below the dew point

c) when the water vapor forms ice crystals

d) when air reaches 10,000 ft

2. what causes convection currents?

a) density differences

b) earth's gravity

c) fossils

d) they don't exist