Answer:
Pulse modulation
Step-by-step explanation:
Remote control toys use the radiations that lie in the range of infrared for their working. The frequency of these infrared radiations is 36-46 kilo Hertz.
The signals we give to the toys through remote control are actually given in the form of bits of data which are then modulated with the any desired carrier frequency. Therefore, the data we are sending is in the form of pulses and the pulses' duration determines that whether the signal will be read as OFF (0) or ON (1). This modulation is pulse modulation which is an effective method to lower the power value delivered by a signal by cutting the signal into smaller parts.
Similarly there are some other kinds of modulations used in some other purposes like frequency and amplitude modulation for signals transmission video and music.
Hope it helps!