Answer:
Theme.
Step-by-step explanation:
The given statement is a theme.
A theme can be defined as an idea or prime message presented in a text. The theme can be stated directly or indirectly in the text. In simple words, one can say that it is a moral told in the text.
The given statement "Education is one of the most valuable tools available to a person" represents the main idea or prime message of a text.
Therefore, the theme is the correct answer.