Select the most appropriate option to fill in the blank.

We love to swing from the branches _______ the pond.

over

The correct option to fill in the blank is over.

The sentence is about swinging from the branches over the pond. The word "over" means above and across something. It is the most appropriate word to use in this context, as it conveys the meaning of the branches being above the pond and the people swinging from them.

The other options are not as appropriate.

• On means in contact with the surface of something. This is not the right word to use, as it does not make sense to say that we swing from the branches on the pond.
• In means enclosed by or contained within something. This is not the right word to use, as it does not make sense to say that we swing from the branches in the pond.
• Under means below something. This is not the right word to use, as it does not make sense to say that we swing from the branches under the pond.