In Human$-$Computer Interaction $($HCI$),$ what is a prototype primarily used for?

$2$

a$.$

To explore and validate design ideas through preliminary versions that can range from simple sketches to detailed simulations.

b$.$

To create a high$-$fidelity model that eliminates the need for further design iterations.

c$.$

To finalize and deploy a fully functional version of the software or hardware system.

d$.$

To develop a static representation of the final product that only stakeholders can review.