The author of Passage 1 indicates that the relationship between soil bacteria and legumes is Choose 1
mutually advantageous to both the bacteria and the plants.
responsible for a decrease in the plants’ survival rates.
more beneficial to the bacteria than to the plants.
a possible explanation for the soil’s nitrogen deficiency.

mutually advantageous to both the bacteria and the plants.

Explanation:

This is the best answer. The author states that " stabiotic arrangement" between legumes and soil bacteria "benefits both parties," In other words, the   arrangement is beneficial  or advantageous to both the bacteria and the plants.

the answer is letter c : ) hope this