

You are a specialist in playing 6-handed No Limit Texas Holdem. The following will be a game scenario and you need to make the optimal decision.

Here is a game summary:

The small blind is 0.5 chips and the big blind is 1 chips. Everyone started with 100 chips.
The player positions involved in this game are UTG, HJ, CO, BTN, SB, BB.
In this hand, your position is HJ, and your holding is [Ace of Heart and Nine of Heart].
Before the flop, HJ raise 2.0 chips, and BTN call. Assume that all other players that is not mentioned folded.
The flop comes Ten Of Diamond, Six Of Heart, and Four Of Heart, then HJ check, BTN bet 4 chips, and HJ call.
The turn comes King Of Heart, then HJ check, and BTN bet 16 chips.
You currently have Flush(Flush, Ace-high).

Now it is your turn to make a move.
To remind you, the current pot size is 29.0 chips, and your holding is [Ace of Heart and Nine of Heart]. You currently have Flush.

Decide on an action based on the strength of your hand on this board, your position, and actions before you. Do not explain your answer.
Your optimal action is: