The production of food from animal sources has increased greatly in the last few decades. Justify it.

The ever increasing human population and the resultant decrease in agricultural land has compelled human beings to move towards animal husbandry to obtain food from animal sources. The last few decades have seen enormous rise in animal meat production and byproducts. Poultry, fisheries, piggery, cattle, sheep and goat farming have developed considerably. milk and egg production have registered a record increase. It is adding to the income of the farmers and helps in providing the supply to the urban areas.