The: Definite Article
"The" is the definite article that comes before a noun, or an adjective before the noun. It introduces the noun as something specific that is going to be talked about.
- Members of the council knew that the planet harbored microorganisms.
A: Indefinite Article
"A" is the indefinite article that comes before a noun, or an adjective before the noun. It introduces the noun as something non-specific.
- The ship is on a destructive path.
- It was a responsibility of the council to monitor any planet with life in order to report back to Earth.
Exercise
Open the exercise to begin the activity. Follow the instructions in the document.