Helene is 65 years old and is returning to school to get a bachelor's degree. She is curious about how her age will impact her ability to be successful in school. Which factor should Helene take into consideration as she prepares herself for her coursework?

In social studies, the word sustain means the ability for a society to survive using a certain practice and resources.

For example, this word is often used when we're discussing energy source.

Experts often argue whether the use of oil as our main source of energy is sustainable for our society. Even though it's cheap, it created a lot of damage to our environment that might be irreversible. They started to point out that it might be the time when people have to start finding other source of energy to sustain their day to day activities (such as solar , wind, or electricity)