What type of attack is being attempted when an attacker uses a password-cracking program to guess passwords by attempting every possible combination of letters?

I’m pretty sure it is Brute Force.

Check this article to be sure:

https://www.techrepublic.com/article/brute-force-and-dictionary-attacks-a-cheat-sheet/

a) click on any cells in the range of data

b) click the data

c) click sort& filter group, click sort

d) select the column to sort by and then select a sort order

e) select the next column to sort by and select the sort order

f) click ok