Answer:
coarse
Step-by-step explanation:
In the project, students have to make something unique out of coarse material.
The words "course" and "coarse" are referred to as homophones in English language, which simply means that they have the same pronunciation but are different in terms of meaning, spelling and origin.
Coarse can be defined as an inferior quality of a physical object due to the structural presence of large particles or parts.
Generally, coarse is a word used to describe the texture of a material based on qualities such as thickness, roughness, hardness, sharpness, etc.
On the other hand, course is an English word that may be used as an adjective, verb or noun depending on the speaker or writer. It could mean a series or sequence of events, part of a meal, a path (direction) in motion, to flow naturally, a subject in academics, etc.
Hence, the students were required to make something unique from a material that isn't fine in texture i.e being large and loosely arranged.