In the following passage there are blanks, each of which has been denoted by a letter. For each blank, five options are given. Choose the most appropriate word from the options that fits the blank appropriately

India's digital payment ecosystem has undergone a __(A)__ transformation in the last decade. The launch of the Unified Payments Interface (UPI) in 2016 proved to be a __(B)__ moment, enabling instant bank-to-bank transfers through simple mobile applications. Within a few years, UPI transactions __(C)__ into billions every month, far __(D)__ the volume of traditional card-based payments. The government's push for financial inclusion, __(E)__ by the Jan Dhan Yojana and the broad penetration of low-cost smartphones, created a __(F)__ environment for digital wallets and payment apps to __(G)__ in smaller cities and rural areas.

Which of the following fit in the given blank (G)?

The correct option is Flourish.

Let's analyze the context of the sentence containing blank (G):
"The government's push for financial inclusion, ... created a [favorable] environment for digital wallets and payment apps to __(G)__ in smaller cities and rural areas."

The passage highlights the massive growth and success of India's digital payment ecosystem, particularly UPI, due to supportive factors like government initiatives and high smartphone penetration. A favorable environment allows businesses, technologies, or apps to grow rapidly, thrive, and succeed.

Let us evaluate the given options to find the best fit:
- Retreat: Means to withdraw or go backward. This contradicts the positive growth narrative of the passage.
- Struggle: Means to contend with difficulty. A supportive, favorable environment would not cause apps to struggle.
- Survive: Means to continue to exist, often suggesting barely getting by. This is too weak to describe the positive transformation and expansion discussed in the passage.
- Operate: Means to perform a function or work. While grammatically possible, it is neutral and does not capture the sense of rapid growth and success described.
- Flourish: Means to grow vigorously, thrive, and be highly successful. This perfectly aligns with the context of a supportive environment that enables digital apps to expand and succeed in rural areas.

Hence, Flourish is the most appropriate word for blank (G).