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Fill in the blank:

(a) The insects, butterflies, honeybees and birds help flowering plants in ........
(b) A forest is a purifier of ........ and .........
(c) Herbs form the ............ layer in the forest.
(d) The decaying leaves and animal droppings in a forest enrich the ............
NCERT Solutions for Class 7th Science Chapter 17 Forests: Our Lifeline Page 218 Exercise Question 7


a) pollination
b) air and water
c) lowest
d) soil
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