Job opportunities for students are expanding rapidly and more people of all ages are becoming aware of online learning that allows them to study at home. (Para.1)
Meaning: Students have many more chances to get jobs, and more people of different ages are beginning to learn about online learning which allows them to study at home.
expand: v. (cause to) grow larger
Iron expands when it is heated. 加热时铁会膨胀。
The company has expanded its operations in America by building a factory there. 这家公司在美国建立了一家工厂，从而扩大了在美业务。
people of all ages: people of different ages
be aware of: having knowledge or understanding of
I'm quite aware of how you feel about this problem. 我很清楚你对这个问题的感受。
He was so deep in his reading that he wasn't aware his father had entered. 他读书很专心，连父亲进门都不知道。