Final answer:
The top-level domain (TLD) in a URL is the part after the last dot, and .edu is a TLD indicating an educational institution.
Step-by-step explanation:
The top-level domain (TLD) for a universal resource locator (URL) is indicated by the part of the URL that follows the last dot. In this case, .edu is a TLD that signifies an educational institution, such as a college or university. Other common TLDs include .gov for government websites, .org for non-profit organizations, and .com for commercial or business websites. These TLDs help indicate the type of entity that manages the site and can give an idea about the reliability of its content.