What’s the difference between passive and active voice in writing?

Passive voice produces a sentence in which the subject receives an action. In contrast, active voice produces a sentence in which the subject performs an action. Passive voice often produces unclear, wordy sentences, whereas active voice produces generally clearer, more concise sentences.

the service industry in the united states grew in the late 1800s. what was one effect of that growth?

the number of people with jobs in factories as unskilled workers decreased.

the number of people with jobs in factories as unskilled workers increased.

the middle class grew as people took jobs as clerks, lawyers, and teachers.

the middle class shrank as people left jobs as clerks, lawyers, and teachers.