A simple introduction to this answer can revolve around a basic fact such as:

According to the United Nations Conference on Environment and Development (UNCED), it is defined as “Development that meets the need of the present generation without compromising the ability of the future generation to meet their own needs”. The use of the concept of ‘needs’ in the definition is linked to the distribution of resources.

or

According to the seminal report – Our Common Future, it is defined as “meeting the basic needs of all and extending to all the opportunity to satisfy their aspirations for a better life”.

Body:

You may incorporate some of the following points in the body of your answer:

• The year 2015 has been a milestone for global development as governments have adopted the 2030 Agenda for Sustainable Development, along with the Sustainable Development Goals (SDGs). The bold agenda sets out a global framework to end extreme poverty, fight inequality and injustice, and fix climate change until 2030.
• Tourism has the potential to contribute, directly or indirectly, to all of the goals. In particular, it has been included as a target in Goals 8, 12 and 14 on inclusive and sustainable economic growth, sustainable consumption and production (SCP) and the sustainable use of oceans and marine resources, respectively.
• India is focused on using tourism as a vehicle to achieve Sustainable Development Goals during the G20 presidency.
• Indian villages are getting global recognition for rural tourism. For example, Pochampli village in Telangana has been declared one of the best tourism villages by the United Nations World Tourism Organisation.
• Tourism has the potential to generate the maximum number of employment with minimum investment and thus tourism can be a positive force for economic transformation, rural development and community well-being.
• Tourism could be used to enable sales of local products and services, youth to become entrepreneurs; provides a channel for employment of women and non-advantaged communities like tribals and thus leads to community empowerment and poverty alleviation.