"The northern front" is the front among the following choices given in the question where the fighting occurred <span>during the Revolutionary War. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has come to your desired help.</span>
It lead to the holocaust and the death of many Russian citizens
<span>Kepler's laws of motion helped overturn the earlier Aristotelian astronomical system which believed that the sun and planets revolved around the Earth. In order for the older system to work, a complicated mechanism known as "epicycles" was required to make the visible motions match the theory.</span>
To say that authority is <em>broadly accepted.</em>