The arrows in the image above show cause and effect. which of the models depicts an accurate cause-and-effect relationship?

a.
model a

b.
model b

c.

model c

d.
model d

A.Model A

Explanation:

Deforestation leads to desertification, this means that the deforestation is the cause and the effect is desertification. When deforestation occurs, you cut an unhealthy amount of trees from a given ecosystem, the roots keep the water from the water cycle to go away, and they make the land more humid and fertile, if you remove this natural barriers for water the water will just wash away, making the ecosystem more and more dry.

originally he was supposed to be dead but they wanted to continue the series so they brought him back to life.

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.