The ration (daily food requirement) for broilers is carbohydrate-rich with adequate minerals.

The level of vitamins $A$ and $K$ is kept high in poultry feeds.

Which of the following is raised as food for the livestock?

On what factors do the growth of plants and flowering depend?

Neem and turmeric powders are often used in grain storage.
$(i)$ What are they called?
$(ii)$ What is the purpose of using neem and turmeric?
$(iii)$ What are herbicides?

Gautam visited a fair along with his classmates. There he found that a hawker was selling balloons filled with helium gas. His teacher told the students that the balloons will rise in the sky and then stop after some distance. Gautam questioned his teacher as to why the balloons would stop. He started arguing with his teacher that the balloons would rise indefinitely. His teacher got irritated with him. Just then,Gautam's friend Avdesh took him aside and explained to him that the teacher was correct. The explanation given by Avdesh satisfied Gautam.
$(a)$ Why will the balloon stop after rising to a certain height?
$(b)$ What values are shown by Avdesh and Gautam?