Can someone tell me how mars and earth is similar to each other and how its different

Both mars and Earth orbit the same sun and Mars has a solid surface like Earth does. Mars has ice in its north and south poles like Earth does but Mars is around half the size of Earth. Mars even has seasons! Since Mars has lower gravity than our planet, you can jump a lot higher. The problem with Mars is that there is almost no oxygen in the atmosphere.

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.