Final answer:
The software described is a Web-Based Application, accessed through the World Wide Web. A software developer works in the Tertiary sector of the economy, which involves providing services.
Step-by-step explanation:
The type of software described in the statement is D) Web-Based Application. This category of software is designed to work over the internet and requires a web browser for its operation. It is typically hosted on a remote server and accessed through the World Wide Web, hence the name 'web-based'.
As for the sector of the economy someone working as a software developer would be in, the answer is c. Tertiary. The Tertiary sector encompasses services, and software development falls within this category as it involves providing technological services and solutions rather than manufacturing goods or extracting materials.