What force is present at a convergent boundary?
a. torsion
b. tension
c. shearing
d. compression

Option (d)

Compression is the force that is present at a convergent boundary.  

Explanation:

Stress is any external force that acts on the rock leading to either it’s deformation or Reformation. Compression is a type of stress that acts towards the centre of a rock and is present at a convergent boundary.

Horizontal compression may lead to a break in the crust of the earth which is known as thrust faulting whereas vertical compression may lead to a normal fault.  

b. niger

explanation:

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.