Select the most appropriate word to fill in the blank and make a meaningful sentence.

Be careful not to drop this glass case; it's very ________.

fragile

The most appropriate word to fill in the blank and make a meaningful sentence is:

☀ fragile

The sentence would read: "Be careful not to drop this glass case; it's very fragile."

Explanation: "Fragile" means delicate or easily breakable. In this context, it warns about the delicate nature of the glass case and the need to handle it with care. The other options don't fit the context:

• Rigid: This means stiff or inflexible, and it doesn't convey the idea of being easily breakable.

• Smooth: This refers to a texture and doesn't convey the idea of being easily breakable.

• Hard: This refers to a physical property and doesn't convey the idea of being easily breakable.