Beginner Move Function Problem 3

White to move. A little bit different this time, and harder. This time, the question is not what function does the move actually have (some of them have practically no function), but what might White be thinking, AND, more importantly, does the move actually fulfill that function? Options:

1) Invade opponent's prospective territory.

2) Save a weak stone and destroy territory.

3) Secure territory.

4) Create a moyo.

5) Attack weak stones.

6) Kikashi (a forcing move)

See /Solution.