(a)(i) Map of Nigeria showing three climatic belts

(ii) The dominant air mass
(a) Tropical Maritime air mass and
(b) Tropical continental air mass
Three adaptation of Sudan savanna to climate of Nigeria
(i) Trees have long tap roots which reach ground water during dry season.
(ii) Shedding of leaves in the dry season
(iii) Thorny leaves to control rate of evapo-transpiration
(c) Four economic importance of vegetation to man include:
(i) Provision of food e.g fruits, seeds etc for man
(ii) Provision of food for animals
(iii) Provision of raw materials for industrial purposes e.g twines, ropes
(iv) Provision of employment and fuel.