The rate of doing work is called:

power

The correct answer is option 3. power.

The rate of doing work is called Power.

Power is defined as the rate at which work is done or the rate of energy transfer. Mathematically, power (\( P \)) is calculated as the work done (\( W \)) divided by the time (\( t \)) taken to do that work:

\[ P = \frac{W}{t} \]

Power is measured in units of watts (W), where 1 watt is equal to 1 joule per second. It represents how quickly work is performed or how quickly energy is transferred.