Is this a run-on sentence?

in 1227, genghis khan, the mongol leader who conquered much of central asia, died he was buried in an unmarked grave, and its location remains a mystery today.

Which statement best expresses a claim a.although many people believe homework is a crucial part of school, there is evidence to suggest that homework may not be as valuable as once thoughtb.the amount of homework given by some high school teachers is insane and actually has negative effects on other important aspects of a student's life c.i would have so much more time to do the extracurricular activities and hobbies i enjoy if i did not have to spend most of my evenings doing homework d.some schools have adopted homework policies that limit the amount of homework that teachers are allowed to assign their students each night

What does this excerpt explain about this setting

In at least 150 words, discuss the comparison described in the figurative language and how the connotative language reinforces the symbol. certainly the utmost rim of my first dome was filled with the tumultuous impression of soldiers marching to death for freedom's sake, of pioneers streaming westward to establish self-government in yet another sovereign state. only the great dome of st. peter's itself has ever clutched my heart as did that modest curve which had sequestered from infinitude in a place small enough for my child's mind, the courage and endurance which i could not comprehend so long as it was lost in "the void of unresponsible space" under the vaulting sky itself.