1- A sentence fragment does not express a complete thought. A sentence fragment are groups of words that look like sentences, but there are not.
In this case, the fragment sentence is the folowwing: Mostly the ending.
2- Since you don't have it ( does not expresses a complete thought)
3- Correct run-on sentence: semicolon between the two independent clauses. You can also use period instead.
4- A dependent clause is a group of words that leaves a thought unfinished.
5- A sentence frangment fails to express a complete thought.
6- Run-on example: My computer hates me I really think it does. There're two independent clauses. You will need to use a semicolon or a period.
7- Run-on sentence.
8- A sentence.
9- Correct: I like ice cream; It is delicious.
10- Please help me wash him, he’s dirty. This sentence is an example of comma splice. A semicolon or otherwise a period is needed.