Click sound in ford escape hybrid

2009 Ford Escape Noise Problem with 78000 miles

My hybrid car
i have hear metalic click sound from tensioner snice i bought my car at 70000 mile.
it apear when car is warm not cold with start up my car and with each acceleration .the performance of my car no changed sice i bought it ,it s good
if u please help why it click with each acceleration its noisy and bothering me.
note: the sound is the same when i turn on the AC ,it is from tensioner also.
iam sure from the site.

Does is click in time with the engine?

yes