Question

This helps the food to move easily in the digestive tract:
a) Milk
b) Curd
c) Oil
d) Water​

Answer 1

Answer:

water

Explanation:

Aim : To know the use of water.

What you need :

1. Piece of Sponge 2. Plastic Pipe 3. Water 4. Bucket

How to do :

i) Take a piece of sponge and try to move through a pipe. It moves with some difficulty.

ii) Remove the sponge from the pipe. Dip it in water and try to move it again through the pipe

and observe.

What you see : Sponge moves freely in the pipe.

What you learn : Water helps in the movement of materials in narrow tubes like intestine.