Which of the following is an ecological value of forests?

Forests provide us fuelwood for domestic and industrial uses.

Forests supply raw materials for manufacture of paper, plywood, cardboards, etc.

Forests provide food items in the form of roots, tubers, leaves, fruits, spices, etc.

Forests help in increasing the soil fertility by promoting humus formation.

Medicines like quinine and camphor and products like resins, turpentine, gum, and dyes are obtained from forest trees.