The animals in forests are of various types. These could be herbivores, carnivores, microorganisms, etc. These play an important role in maintaining the food chains.
(i) Microorganisms convert the dead plants and animals into humus. This humus helps in returning the nutrients back to the soil. These are absorbed by plants.
(ii) The animals also help in dispersing the seeds of certain plants.
(iii) The decaying animal dung provides nutrients.
All these activities of animals dwelling in the forest help it to grow and regenerate.

Forests are called the green lungs. This is because plants in forests release oxygen through the process of photosynthesis and help in providing oxygen to animals for respiration. They consume carbon dioxide released by the animals. In this way, plants help in maintaining a balance of oxygen and carbon dioxide in atmosphere.

(i) Fruits
(ii) Vegetables
(iii) Medicines
(iv) Oxygen
(v) Cereals

Decomposers and scavengers are cleaning agents. So, every entity in the forest plays a key and vital role making it a dynamic living entity, full of life and vitality.

Since, all food chains are interlinked disturbance in one food chain will affect the other food chain in a forest.

The four birds which we expect to see in a forest are jungle crow, hornbill, myna and koel.

A typical food chain in a pond is Algae ⟶ Small fishes ⟶ Large fishes.

Doors and window frames, table, chair, bed, paper, match stick, gum, spices etc.

Forests maintain balance in nature. There conservation is the need of the hour. We should take the following steps to conserve the forests.
(i) Planned harvesting An efficient way to get wood from forests for our requirements is to cut only some of the trees in an area. The uncut trees prevent erosion. Fruits of these trees produce seeds so that new trees can grow. This way the forest cover is maintained.
(ii) Afforestation This is the practice of renewing a forest by planting seedlings or small trees. These days, in our country, planned afforestation is being done not only by the government but also by private organisations for commercial purposes. Selective cutting of trees in these plantations provides wood for construction and also keeps the forest cover intact.
(iii)Protection from fire Huge forest areas are destroyed by fire every year. Fire may occur due to the carelessness of people or due to lightning during a storm or by friction between dry stems and dry branches of trees.Forest fires are controlled by spraying fire extinguishing solutions from aircrafts or by changing the direction of wind by using strong blowers.

The papers are made from wood pulp. We derive wood by cutting down trees. If we recycling existing quantity of paper in the market and will not let it decompose, we can stop cutting of forest trees for new raw materials required for paper making.It takes years to grow a tree and cutting a tree takes only few minutes. So, we should give a serious thought before cutting a single tree even and should encourage recycling of papers every where In our country and in the world.