What causes atmospheric convection? a. energy from deep in the earth heats the ground, heating air at the surface and causing the air to rise. b. energy from deep in the earth cools the ground, cooling air at the surface and causing the air to sink. c. the sun's energy heats the ground, heating air at the surface and causing the air to rise. d. the sun's energy cools the ground, cooling air at the surface and causing the air to sink.

answer:

the answer is d

explanation:

lighter (less dense), warm material rises while heavier (more dense) cool material sinks. it is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of earth. in the atmosphere, as air warms it rises, allowing cooler air to flow in underneath.

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.