For #2, look at the second map and see what resources the land held that we gained along with the land.

In 1845, we gained eastern Texas, which led to us gaining Coal

In 1846, we gained Washington state, Idaho, Oregon, and western Montana and Wyoming, leading to us getting gold, coal, and coal.

In 1848, we gained the western-half of Texas, Eastern New-Mexico, and parts of colorado, leading to us gaining, coal, oil, and gold.

In the later-half of 1848, we gained California, Nevada, Arizona, Utah, Western New-Mexico, western Colorado, south-west Wyoming, and we gained Gold, coal, and oil.

In 1853, we gained the Gadsen Purchase which gave us gold in Arizona and New Mexico, and Oil in New Mexico.

hope this helps

he did it to save us from our sins, so we can see him in heaven 1 day. it's because he loves us so much. he used himself as the final sacrifice, so that we could be forgiven for our sins, so that we can see him in heaven, if we believe.