1. The percentage of the labor force in the US that works directly in
agriculture(farmers) is *

In 2019, 22.2 million full- and part-time jobs were related to the agricultural and food sectors—10.9 percent of total U.S. employment. Direct on-farm employment accounted for about 2.6 million of these jobs, or 1.3 percent of U.S. employment.

Explanation:

number 1 is a)

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.