Mr. Reese conducted a concept lesson in math and assigned a challenging task. He expected some of his students to grasp the concept and complete the task with moderate effort, but he knew other students would not. He monitored their progress, stopping to prompt with questions or drop hints to help students connect prior learning with this new concept. Mr. Reese was providing:

Scaffolding

Explanation: Scaffolding can be simply defined as an instructional method of teaching where an instructor guides his or her students through a step required to complete a task and as they become efficient, he or she begins to withdraw his influence or involement in the guidance process and only give assistance to them if they really need it.

Mr Reeese guided his students through a concept lesson before withdrawing his involement and gave them a challenging task, he monitored and constantly drop hints to help the new students connect prior learning to the new concept.

Mr Reeese was providing Scaffolding.

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane