A(n) which is contained on an integrated circuit, can act as an electronic switch that opens or closes the circuit for electrical charges? .a. transistor c. capacitor b. switcher d. resistor

a. Transistor

Explanation:

A transistor is an electrical element that can perform two distinct tasks.  

It can function either as an amplifier or as a relay/switch:  when it operates as an amplifier, it requires a small electrical current at the start  (an initial current) and at the other end generates a much larger electrical current  (an exit current).

Only when a voltage is applied to the core, a transistor conducts current across the  collector-emitter route. If there is no core voltage, the switch will be off.  The switch will be on when the core voltage is active.