What is the main focus of "the damation of a canyon"?

a. how industrialization by humans can destroy natural habitats

b. how lake powell is a huge reservoir behind the glen canyon dam

c. how humans have nurtured and cared for animal life around glen canyon

d. how the author took a nostalgic boat trip down the colorado river

How industrialization by humans can destroy natural habitats

How industrialization by humans can destroy natural habitats

Explanation:

The author emphasizes how much the scenario has changed for Glen Canyon and the Colorado river due to human intervention. He narrates in explicit detail how different it looks like now compared to how it was back in 1959, the year when he went on rafting trip to the Canyon with a friend. He explains that the sole purpose of the dam they have built there is to provide entertainment for the middle class and above as those kind of people use motorboats to move about. This dam has drastically changed the wildlife in that area, specially around the river. The author even states that it would be much better if the dam was destroyed so that nature could restore itself.

i go to the store and buy some cheese,suddenly there was akward silence.   out of no where comes a ninja, and he takes an apple, and chokes the cashier, until he passes out.   the disapeared in a puff of smoke.   the cashier went to the doctor, and everything was fine again.   they all lived happily ever after without anymore ninjas.

the end

go to buy cheese= exposition

akaward silence= rising action

ninja chokes the cashier= climax

cashier goes to the doctor= falling action

they live happily ever after= resolution

the correct answer would be:  

a. adverb phrase