(a) The natural environment is the habitat where plants and animals dwell in undisturbed form or state
(b) Four advantages of man's intervention with natural environment include:
(i)Agricultural products for domestic and industrial uses
(ii) Mineral products for industrial uses
(iii) Land for settlement
(iv) Water for domestic and industrial uses.
Four disadvantages for man's interventions with natural environment include:
(i) Depletion of mineral resources
(ii) Depletion of vegetation resources
(iii) Pollution of water, land and air
(iv) Drought and desertification