Answer: During the day, especially in the afternoon, layers of air heat up, which is needed to create convective clouds
Explanation: Convective clouds, as the name implies, are created by convection. It is a process of raising warmer air of lower density than is the case with the surrounding atmosphere. Warm air contains more moisture, i.e. water vapor than cold, and when warm air rises during the day, it passes through layers of cooler air, causing water vapor to condense, creating droplets. During the morning, the air is generally cold, and during the day due to the rise in temperature, certain layers of air become warm, which then begin to rise and pass through the surrounding, cooler layers. Thus, the said condensation process takes place.
The answer is D. heat flow and the movement of material inside the Earth
That is the only really obvious answer since it's basically talking about plate tectonics.
Convection occurs in fluids (so both liquids and gases, as well as rheids) and is the concerted, collective movement of groups or aggregates of molecules within the above through advection or diffusion or both at the same time. Convection can never take place in solids and is only specific to fluids.
