Answer:
(i) Humans derive numerous economic
benefits directly from diversity of organisms.
(a) Food products (cereals, pulses and
fruits).
(b) Firewood.
(c) Fibre (cotton, jute from plants
and silk, wool from animals).
(d) Construction material
(timber for making furniture, houses and sports goods).
(e) Industrial products
(tannins, lubricants, dyes, resins and perfumes).
(f) Products of medicinal
importance (about 25000 plants are used in traditional medicine).
(ii)There are huge
intangible benefits that humans derive from the diversity of life.
(a) Pure oxygen.
(b) Natural pollinators.
(c) Flood and soil erosion
control.
(d) Nutrient replenishment.
(e) Waste recycling by microbes
and other insects, etc.
(f) Aesthetic pleasure and
mental peace.
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