Final answer:
The Gupta Empire is referred to as the Golden Age of India because of its substantial cultural contributions, including scientific innovations, the flourishing of arts and religion, and scholarly patronage.
Step-by-step explanation:
The Gupta Empire is considered to be the Golden Age of India due to its remarkable cultural flourishing. During this period, significant advancements were made in various fields such as science, art, and religion. The empire was known for its support of the arts and promotion of scholars, which led to an intellectual renaissance. Indian mathematicians made critical discoveries including the invention of the number zero, as well as calculating the value of pi (π) and determining astronomical measurements with outstanding precision. Additionally, the Gupta period saw a blossoming in religious expression and literature, including the creation of the Kannada Sutra and the patronage of Buddhist universities like Nalanda.