In terms of SI prefixes 10^(-15) is called:

Femto

The correct answer is option 4. Femto.

In terms of SI prefixes, \(10^{-15}\) is called Femto.

The SI prefix "femto" is used to denote \(10^{-15}\) or one quadrillionth (1/1,000,000,000,000,000) of a unit. Therefore, a quantity expressed with the prefix "femto" is \(10^{-15}\) times the value of the unit it precedes. For example, one femtosecond (fs) is equal to \(10^{-15}\) seconds.