Answer:
c) aesthetic modifications
Step-by-step explanation:
Product modification are when changes are made to a product.
Aesthetic modifications is when changes are made to a product to make it more attractive to the senses. Modifications made includes changes to the look, smell, taste, or sound of a product.
Functional modification is when changes are made to the functions performed by a product to make it more useful, versatile or safe.
Quality modifications is when modification is made to improve the quality of a product - to make it more durable and to increase its useful life.
Line extension is when a firm adds more products to its already existing product line.