When you are writing, it is important to know the purpose and be aware of the:
question 5 options:

definitions

facts

audience

language

Well, it all depends on what your writing, when writing something to a post on Facebook to an essay; you'll need to know the definitions, audience, facts and language. If anything i'd go with the definition, because it is more important to know what your talking about than anything. 

1. You may have talent, but if you don't put forth effort into that talent it may never develop into a skill or be something you're really good at. You could even potentially lose that skill.

2. You may have a skill, but if you stop putting effort into it and give up on it you won't reach your goals or achieve the success you're looking for.