Final answer:
Using only numbers is not a good suggestion for creating a secure password.
Step-by-step explanation:
The NOT a good suggestion to create a secure password is to use only numbers (option 2). A strong password should include a combination of uppercase and lowercase letters, numbers, and special characters. Using only numbers makes the password easier to crack because it reduces the number of possible combinations.
A minimum of 10 characters (option 1) is a good suggestion as it increases the complexity of the password and makes it harder to guess or crack. Using a combination of uppercase and lowercase letters (option 3) and special characters (option 4) adds another layer of complexity, making the password more secure.