What is the result of adding 4 and 5 together?

When adding 4 and 5 together, the correct result is 9. This is determined by the basic principle of addition, where you simply combine the two numbers. In this case, starting from 4 and counting up 5 more steps gives you 5, 6, 7, 8, 9, resulting in a total of 9.

Understanding how addition works in this manner is fundamental for various applications, including mathematics and problem-solving in everyday situations. The other choices represent different numerical values that do not correctly reflect the sum of 4 and 5.