Which one is not a source of carbohydrate?

How can poultry farming be integrated with crop production? How are improved poultry breeds developed in poultry farming?

Fertilizers have short-term benefits whereas manures have long-term benefits. Do you agree with this statement? Give three reasons in support of your answer.

An Italian bee variety $A. mellifera$ has been introduced in India for honey production. Write about its merits over other varieties.

The method of incorporating desirable characters into crop varieties is by

Two friends,Girish and Neeraj,were discussing Newton's third law. They were perplexed about how action and reaction are equal and opposite. They could not think of an experiment by which they could ascertain this fact. Pushkar,who was their friend,told them that he would set up an experiment to prove this to them. By performing an experiment,Pushkar demonstrated the law.
$(a)$ Can you think of an experiment by which you can demonstrate this law?
$(b)$ What values do you think Pushkar has?