Answer:
Because more capital is available leading to higher output through capital deepening
Step-by-step explanation:
When the citizens/residents of a country consume goods and services produced locally in the country they will inevitable add to the GDP growth of the country because finished goods produced and consumed will lead to a higher GDP growth for the economy of the Nation.
When the level of savings by the citizens is on the high there would be more capital available in the next financial year therefore leading to increase in production of goods and service and this will lead to increase consumption of the finished goods therefore increasing the GDP