Final answer:
The DEFINE step of the Problem Solving Process for the students painting a mural is identifying the purpose, scope, and constraints of the mural project.
Step-by-step explanation:
The DEFINE step of the Problem Solving Process for the students painting a mural would be d) Identifying the purpose, scope, and constraints of the mural project. In this step, the students would determine why they are painting the mural, what the mural should depict, and any restrictions or limitations they need to consider.