Which of the following best explains what a natural resource is? Materials or substances that occur in nature and can be used for economic gain.
Materials or substances that occur in nature and can be used for economic gain.

Manufactured materials or substances that are created and can be used for economic gain.
Manufactured materials or substances that are created and can be used for economic gain.

A combination of natural and manufactured materials or substances that can be used for economic gain.
A combination of natural and manufactured materials or substances that can be used for economic gain.

The work one completes in a factory or on a farm.
The work one completes in a factory or on a farm.

Why does henry david thoreau think imprisonment is ineffective?

The story line remains the same. the kids live in what was then one of the remaining beachfront slums, down the coast from the expensive malibu area. the beach was ruled by surfers, but in the afternoon, when the waves died down, some of the surfers, or their younger brothers, fooled around on skateboards. one day, skip engblom, the shop owner, comes up with a key breakthrough, polyurethane wheels: "they grip." with the additional traction, the z-boys try skating the sides of the big, open drainage canal that runs through the area. then comes a brainstorm: because of a drought, the area's swimming pools were drained. the kids started "borrowing" pools when the owners weren't home, to skate the curved sides.” where did “the lords of dogtown” originally practice their tricks? a. the beach c. an open drainage canal b. empty pools d. none of these

The empire state building was constructed by one hundred workers