This graph shows life expectancy in the united states. which factor best explains why the graph changes from 1990 to 2010? new technology protects soldiers from risky reconnaissance missions. new technology allows farmers to grow genetically modified crops. new technology allows us to find and use new energy sources. new technology has improved medical imaging and surgery.

The correct answer is - New technology has improved medical imaging and surgery.

The technology is developing very rapidly, and every year it makes big strides forward, and this includes the medical field as well. Pretty much everything in the medical field has been significantly improved, like the medical imaging and the surgeries, and that is saving millions of lives each year.

Because the medical field has improved so much, the people are able to live longer, thus the life expectancy is growing, and as the technology improves in the future, it will grow even further.

assuming that by westerners you mean americans. that they were mean and controlling and abusive to its peasants.

explanation:

1

b gas tractor

2

c and negotiated lower prices for farm equipment and supplies

3

d the grange

4

c over 15,000 bankrupt businesses

5

c people became more self-sufficient