The correct answer is implements.
In the case where there are both the implements and the extends clause present in the class header, the convention is that the first one should be the implements clause, followed by the extends clause.
This makes sense because you first need to implement the meaning you want to talk about, and then you will extend upon it later.
For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord.
:) Good luck, luv
The thesis is usually at the beginning of the essay. It states what you will talk about in the essay. It's kind of like a preview.