Concept:When two locations in space communicate without any physical cable, the transmission medium is said to be wireless or unguided.
Explanation:The transmission of information from location A to location B can happen through guided media, which use physical cables like twisted pair, coaxial cable, or fibre optics.
It can also happen through unguided media, which do not use any physical path and instead carry signals through free space using radio waves, microwaves, or infrared signals.
Since the question specifically says information moves from location A to location B “in space,” no solid cable is involved between the two points.
Therefore, this type of transmission is known as wireless transmission.
Options A and C refer to timing methods used in data transfer, not to the physical medium in space.
Option B refers to cable-based transmission, which does not apply here.
Hence, the correct choice is wireless transmission.
Answer:D. wireless transmission