Which describes producers?

a - They are the first organisms in a food chain.
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b -They receive the least amount of energy.

c -They are at the top of the food chain.

d- They are eaten by second-level consumers.

"They are eaten by second-level consumers" describes producers.

Option: D

Explanation:

The producers are also known as autotrophs, who produce their food with the help of photosynthesis like plants. The second trophic level is made up of organisms who eat the producers, like deer, snakes, and many different kinds of birds. The producers are placed at the bottom or known as foundation or basis of food chain. In food chain there are producers are the first trophic level, consumers are the second level (primary, secondary and tertiary) and decomposers are final third level.

abraham lincoln was the president of usa and he had asked the audience to make a pledge on equality.

his pledge was:

“it is my earnest desire to know the will of the providence.”

lincoln also had hatred for people who condoned and practiced slavery and so he pledged:

""and if i can learnt what it is i can do it"" this is another pledge by abraham to reassure the congregation on how to deal with the providence will.

explanation:

hope this !

d. it adversely affected american productivity