Choose the correct word in the following sentence.
Photosynthesis/Respiration is an activity of all living things.

In the following sentence choose the wrong word.

Inspired/Expired air is rich in oxygen.

Give a reason for the following statement.

There are ventilators in houses higher up on the walls while windows are lower down in the rooms.

Give reason for the following statement.

We make two holes in a can of juice.

Give reason for the following statement.

Inflated balloons are used to lift books, glass, etc.