Select the most appropriate option to fill in the blank.

The box was ______ heavy for that little child to carry.

too

The most appropriate option to fill in the blank is too.

The sentence is about the weight of the box and the child's ability to carry it. The word "too" is an adverb that means more than is necessary or desirable. In this context, the speaker is saying that the box was too heavy for the child to carry.

The other options are not as appropriate.

• Much means a large quantity. This is not the most appropriate option because it does not indicate that the box was too heavy for the child to carry.
• Enough means a sufficient quantity. This is not the most appropriate option because it does not indicate that the box was too heavy for the child to carry.
• Lot means a large quantity. This is not the most appropriate option because it does not indicate that the box was too heavy for the child to carry.