Answer:
Price fixing
Step-by-step explanation:
-Price lowering is when a company decreases the price for a product or service.
-Profit maximization is when a business defines the quantity and price that provides more benefits.
-Price fixing is when companies in the same market make an agreement to sell a product at a certain price which is considered illegal.
-Profit sharing is when companies share a percentage of its profits with the employees.
Considering the definitions and that collusion is when competitors make a secret agreement to get an advantage in the market, the answer is that the form of collusion is price fixing.