An algorithm is a set of step-by-step instructions for completing a task. In the context of buying a pair of shoes from a store, the first logical step would be to enter the store. This is because one cannot select a pair of shoes, bring them to the cashier, or pay for them without first entering the store. The steps should follow a logical sequence based on the dependencies of each action:
* Enter the store - This is the initial step as it allows access to the shoes available for purchase.
* Select the pair of shoes - Once inside, the next step is to choose the desired pair of shoes.
* Bring the shoes to the cashier - After selection, the shoes are taken to the cashier for payment.
* Pay for the shoes - The final step is the transaction to exchange money for the shoes.