A forest is a purifier of _____ and _______.
Air
Water
Forest:
Final answer: A forest is a purifier of air and water.
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 _______.