Descnbe how technology causes change
-Biology

a technological change is an increase in the efficiency of a product or process that results in an increase in output, without an increase in input. ... Processes or products, such as the telephone, move through technological change in three stages: Invention - the creation of a new product or process

Explanation:

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explanation:

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i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.