Answer:
Explanation:
What causes convection cells to form?
Convection Cells
A source of heat is required for a convection cell to form. Fluid is warmed by the heat source and is pushed away. The fluid then begins to lose heat, and inevitably cools. This cooler, denser matter is forced back toward the initial heat source by the flow of newly heated matter.
The perennial system is less dependent on the Nile flood and allows the planting of multiple crops. (source: another brainly question)
Answer : C
In a chain or a series
It traps energy from escaping into space!
