In your view, what are the keys to defining terrorism? What is your definition? (make your own based on the readings and the keys you pointed out in the previous question). Explain your definition.

This question is opinion based, with that said, there can be no wrong answers. Just as long as you have reasoning for your answer, anything you put should suffice.
With that noted, my definition of terrorism is, anyone or anybody who willing acts is a seditious way toward a fellow citizen. To back this up, I would like bring up the Charleston shooting. It is my understanding the shooter was not a foreigner, therefore it eliminates the broader definition of terrorism being limited to foreigners.
Again this question is an opinion based, and from the instructions it looks as though they want you to answer your question with facts from a reading. Gather your thoughts before you type them down, and make sure you support your answer with evidence.

This question asks you to give your own personal view, so your definition of terrorism may not be the same as mine or as that of your classmates. However, the first step in reaching your personal definition is to consider how others might define the term, and then draw your own conclusions based on this research.
There has been no universally accepted definition of terrorism worldwide, but your "keys to defining terrorism," might include assessing what key elements terrorism is generally thought to have, for example, that terrorism involves violence against civilians, that it has politicized goals, and/or that it, in accordance with the term itself, has the intention of spreading terror or a sense of fear among the population. Beyond this, however, it can be difficult to assess what is terrorism and what is not. We might say that terrorist attacks take us by surprise, but on the other hand, some terrorist groups announce their attacks before they happen.
What is the difference, in your view, between a terrorist and a freedom-fighter? Some define the difference as being that freedom fighters do not target civilians, but many described Nelson Mandela as a terrorist. We might then say that terrorism involves attacks on a worthy system, whereas freedom fighters are those who attack corrupt systems——but how do we decide which is which? What are the goals of terrorism; are they to raise awareness of a cause, or do terrorists seek to actually be granted concessions?
Based on your answers to the above questions, then, you may come to a definition of terrorism as, for example, "violent attacks with political motivation, intended to spread fear among the civilian population or achieve political goals."