An “impact risk” number most resembles a number used to show time, like 1:15 P. M.

to show the strength of an earthquake like 7.2

for a date, like 6/11/01.

to show distance, like 4,000 miles.

✅ to show the strength of an earthquake like 7.2

Explanation:

An “impact risk” number as used in the passage most resembles a number used "to show the strength of an earthquake like 7.2".

From the passage, the author reveals that the higher the impact risk number, the greater the chance of the asteroid hitting the earth. He further reiterates that when the impact risk becomes great, more steps are taken to curtail the impact it will have on the earth. These information from the passage actually shows the strength of the earthquake. So, a higher number shows that the strength of the earthquake high.

the answer can be "credo" it means to believe = the word credo means "an official statement of beliefs"