Will give a brainlest the use of machinery and fossil fuels has changed agriculture in the united states. how has the amount of oil used to produce 1 ton of grain changed over a 35-year period? it has been reduced by one-half. it has doubled. it has stayed the same. it is three times as much.

It has doubled.

With the advent of technology, the use of fossil fuels has also being increased , which is utilized as a fuel fro providing energy. The increase in population has increased the demands for food, therefore, has increased the burden over the agricultural practices to meet the needs of the growing population. Hence, in the present era the amount of oil used to produce 1 ton of grain changed over a 35-year period has doubled.

a. autosomal.

explanation:

a. by using fur or clothes to trap heat energy near the body