Question

What are the major sources of food? Name the commercial practices we perform to obtain the food.

Answer 1

Hint: All living organisms required food to live. Except for plants, all living organisms depend on other organisms for food. Plants prepare their own food by performing photosynthesis, while animals depend on other organisms for food.

Complete answer:
Plants and animals are the main source of food for all the organisms on earth. Food obtained from animals is the main source of protein that includes fish, milk, meat, poultry and cheese. Whereas, plants provide us with fruits and vegetables, which are an important source of fibres, proteins and carbohydrates.
Main Commercial methods to obtain food: -
a. Agriculture:- Agriculture is one of the most ancient works in the world. Agriculture occupies 11% which is about 1.5 billion hectares of the earth’s surface and 13.4 billion hectares of the land surface. In agriculture, mostly paddy, wheat, corn, vegetables, are grown.
b. Animal husbandry: - Animal husbandry involves raising cattle on a large scale. Here, animals are raised for meat, skin, internal organs, etc. Meat is used as food, the skin is used for making coats, etc.
c. The other commercial methods include obtaining food by pisciculture, poultry, etc.

Note: Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago.