What is the SI unit for intensity?

A. Joule

B. Watt

C. Decibel

It is the decibel.

A decibel is one tenth of a bel.

Watt Per Square meter^2

So your answer is watts

Explanation:

The SI unit of intensity is watt per square meter^2 (W/m^2.) Intensity is equal to the power transferred per unit area. Since power is measured in watts (W) and 1 W = 1 J/s, then intensity can be viewed as how fast energy goes through a certain area