why a pungent odour, makes us close our nose.

How do the following process occur: A pungent occur makes us close our nose.

why tears good for us?

What did you feel after keeping your mouth and nose closed for so long ?

Which organism makes use of our house as a habitat'?

Why is water used at our homes a good conductor of electricity?

What is the least number of sticks needed to form a closed figure ? Obviously three .can you explain why two match sticks can not make a closed figure.

When we go on a busy road, feel uneasy even when we close nose with a napkin. Why these symptoms we observe?

How long could you keep your mouth and nose closed ?

Why do our legs swell?

When we go on a busy road, feel uneasy even when we close nose with a napkin. If these symptoms will continue, what happens?