Consider the following statements:
Every step in a food chain is called a trophic level.
Decomposers convert complex organic matter into simple substances that mix with the soil.
In a food chain, energy increases from lower to higher trophic level.
Interlinking of multiple food chains forms a food web.
Which of the above statements are correct?
A shop sells a book for 240 rupees after giving a 20 % discount on the marked price. What is the marked price of the book?