Production of goods and services is affected by 4 major factors:
Capital.
Labour.
Land
Entrepreneurship.
Labor which refers to the human input in the process of production is the most abundant factor of production in India.
Labour, in economic terms, is the effort exerted to produce any services or goods.
It is the most abundant and active factor of production because passive factors like capital and land cannot start production and need labour to start production.
The factors of production are four: Land, Labour, Capital, and Entrepreneur.
Labour is a human being's physical or mental contribution to the production process.
Since India has the second-highest population among all the countries, labour is abundant in India.