A metaphor of human-computer interaction (HCI) in which the user interacts directly with objects on the display screen, is referred to as . 1. desktop metaphor 2. document metaphor 3. direct manipulation metaphor 4. dialog metaphor

. 4. dialog metaphor

Explanation:

This is a metaphor of HCI in which interacting with the computer is much like carrying on a conversation or dialog. The user asks the computer for something, and the computer responds. The computer might then ask the user for something, and the user responds. The text provides an example that describes a manager and an assistant carrying on a conversation about messages .

the dependant variable is spilled water

the independent is the heat