What is biodiversity? a. the variety of plant and animal life in a particular habitat
b. an increase in food production to keep up with population growth
c. the relationship between insect pests, crops, and pesticides
d. selecting the most efficient crops for a given geologic area

A.)

Explaination: its right ok

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.

answerinternational border(ib);