It is understandable that this question may seem confusing at first. Let's break it down to better understand it.
Firstly, let's define what AM and FM mean in the context of electromagnetic waves. AM stands for Amplitude Modulation, which means that the amplitude (or height) of the wave is being varied to carry information. FM stands for Frequency Modulation, which means that the frequency (or number of waves per second) of the wave is being varied to carry information.
Now, let's apply this to the scenario of a lost person using a flashlight to signal for help. When the person turns the flashlight on and off, they are essentially varying the amplitude of the light wave to create a pattern of dots and dashes in morse code. This is an example of AM, as the amplitude is being modulated to carry the information of the morse code message.
As for the frequency of the carrier, this refers to the frequency of the original light wave that is being modulated. In this case, the frequency of the flashlight's light would be the carrier frequency. The question is asking for an approximate value, which would depend on the specific flashlight being used.
In summary, the light wave from the flashlight is being used as a carrier wave for AM modulation to transmit the morse code message. I hope this helps to clarify any confusion.