Correct Answer: Frivolous

Solution : The correct choice is the second option.

Grave can have multiple meanings. It can describe something that is serious, solemn, or significant in nature without being light-hearted or cheerful. It can also refer to a burial site, often dug into the ground to bury the deceased.

Frivolous refers to something that lacks seriousness, depth, or importance. It denotes behaviour, actions, or ideas that are not serious or significant.

The meanings of the other options are as follows:

• Native refers to something or someone that originates or belongs to a particular place by birth or by being indigenous to that area.
• Foreign describes something that is not from one's own country or region, something unfamiliar or originating from another place or culture.
• Serious is used to describe something that is important, significant, or substantial.