Final answer:
The correct word for calling people to gather together or when they assemble for a meeting is 'convene'. It is used in various contexts to indicate the act of gathering for a specific purpose.
Step-by-step explanation:
The correct answer to the question "To____ is to either call people to gather together, or when the people come together for the meeting" is D. Convene. The word 'convene' means to bring together a group of people for a meeting, or to assemble formally. None of the other options (Surge, Purge, Nurture) are commonly used to describe the action of calling people together or assembling for a meeting. The verb 'to convene' is used in both business and legal contexts, as well as in everyday language to refer to the act of gathering for a purpose.