Question 68. When we meet other people while travelling, we learn to differentiate between-
(a) friends and foes
(b) communities and nationalities
(c) When we meet other people while travelling, we learn to differentiate between local and universal values.
Question 9 Give various examples to show that friction is both a friend and a foe.
Question 29.2
On an educational trip to Uttaranchal, Ketki and her friends observe that many local people were having swollen necks, Please help Ketki and her friends to find out the solutions to the following questions.
How is it caused?