To calculate the water's salinity
by Elena
D is correct. Cool air sinks, which forces warm air to rise.
Convection is when warm material rises and cool material sinks
Hope it helps
A swim bladder can inflate and deflate when the swim bladder inflates it moves on the surface of the water but if it deflates it will go to the under section of the water <span />
Primary succession can occur in essentially lifeless areas or regions in which the soil is incapable of sustaining life as a result of such factors as lava, sand dunes, or rocks left from a retreating glacier.
Answer:
D. Trees grow back after a forest fire.
