what is the Watering Hole Select one a A region of the radio

what is the Watering Hole?

Select one:

a. A region of the radio spectrum

b. A bar in Star Wars

c. The region of the spectrum between 400 and 700 nm

d. Large clouds of water molecules where aliens go to drink.

Solution

Water hole is a band between 18 to 21 cm of electro magnetic spectrum which is used in radio telescopes.

So a) is the answer.