Explanation

(a) Reasons for keeping goats: (i) Meat as a source of protein for humans (ii) Milk as a source of protein for humans 
(iii) Source of skin for leather production (iv) Source of income (v) Social prestige 
(vi) Cultural obligations/purposes/festivals 
(vii) Source of manure to fertilize fields for cropping:organic manure (viii) Source of employment (ix) Research purpose/education 
(x) Bone/ blood meal as feed for livestock (xi) Source of foreign exchange (xii) Goat show/exhibition (xiii) Mohair production. 
(b) (i) Oestrous: It is the period/time when female animals are willing/receptive to mate with the male of the same species. 
(ii) Signs of heat in a sow: (i) Restlessness running about/uneasiness (ii) Mucous discharge from the vulva (iii)Attempting to mount animals in the herd (iv) Reddened and swollen vulva
(v) Loss of appetite/anorexia (vii) Undue noise making or ranting (viii) Standing still to be mounted (ix) Rise in body temperature (x) Frequent urination (xi) Frequent wagging of tail.

 (c) Completion of the table

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