Which is the important gas used by human being for breathing

Oxygen

Explanation:

We breath in oxygen then breath out Carbon Dioxide that plants use to create Oxygen

c. taught scientists many new things about the earth, but not other planets.

explanation:

jacksonian era promoted strength of the presidency and executive branch at the expense of congress. it also sought to broaden the public's participation in government. the jacksonian's demanded to have elected judges, instead of appointed judges, and rewrote many state constitutions to reflect the new values. hope this ! if you did find it would you mind giving me brainliest? : )