Question

cyrus wants to add more mesh to his model without bringing another mesh object into his project. what tool should cyrus use to do this? loop select tool create face or edge tool loop cut tool extrude selection tool

Explanation:

The Extrude Selection tool allows adding more mesh to an existing model by extending selected geometry, which meets Cyrus's requirement of adding more mesh without bringing in another mesh object. The Loop Select tool is for selecting loops, the Create Face or Edge tool creates individual faces or edges in a more basic way, and the Loop Cut tool cuts loops in the mesh but doesn't directly add new mesh in the way needed here.

Answer:

Extrude Selection tool