According to Porter's five forces model, a student's choice of lunch options at a large food court would be an example of a strong force for .

Threat of substitutions.

Explanation:

Th threat of substitution is defined as the availability of a product that the consumer can purchase instead of the industry's product. The student chooses to buy from the food court despite being in a position to buy from other places with the similar product.The threat of a substitute is the level of risk that a food court faces from replacement by its substitutes.

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.