From the options given below, select the word which is similar in meaning to -

Expand

Enriching

The word that is most similar in meaning to "expand" is enrich.

• Expand means to make or become larger or more extensive.
• Enrich means to make something more valuable, meaningful, or enjoyable.

The other options have different meanings.

• Resident means living in a particular place.
• Redundant means unnecessary or repetitive.
• Simplify means to make something simpler or easier to understand.

So, the answer is Option 3: Enrich.