Though which mode of communication can radio waves be sent from one Plate to another? (A) Ground wave Propagation (B) sky wave Propagation (C) Space wave Propagation (D) All of the above

Before selecting the correct answer, it is important to understand the different modes of communication given in the options: (A) Ground wave propagation: This mode involves radio waves traveling along the surface of the Earth, bending around the curvature of the planet. This type of propagation is suitable for short distances and low frequencies. (B) Sky wave propagation: In this mode, radio waves are reflected off the Earth's ionosphere, allowing them to travel long distances. This type of propagation is suitable for medium and shortwave frequencies. (C) Space wave propagation: This mode involves radio waves traveling directly through the Earth's atmosphere, including through the ionosphere and troposphere. It is used for higher frequencies and can enable communication over long distances and for satellite communications. (D) All of the above: This option implies that radio waves can be sent from one Plate to another using any of the three modes of communication listed above.

Now that we have an understanding of the different modes of communication, let's evaluate the options and check if they are suitable for sending radio waves from one Plate to another: (A) Ground wave propagation: As this mode is suitable for short distances and low frequencies, it may not be suitable for sending radio waves from one Plate to another. (B) Sky wave propagation: This mode allows radio waves to travel long distances, so it can be used to send radio waves from one Plate to another. (C) Space wave propagation: With the ability to communicate over long distances and for satellite communications, this mode can also be used to send radio waves from one Plate to another. As we have found that sky wave propagation and space wave propagation are suitable for sending radio waves from one plate to another, the correct answer is: (D) All of the above