

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 BB, and your holding is [Seven of Heart and Five of Heart].
Before the flop, BTN raise 2.5 chips, and BB 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 BB check, BTN bet 4 chips, and BB call.
The turn comes Eight Of Diamond, then BB check, and BTN bet 10 chips.
You currently have Straight(Straight, Four to Eight).

Now it is your turn to make a move.
To remind you, the current pot size is 23.0 chips, and your holding is [Seven of Heart and Five of Heart]. You currently have Straight.

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: