The last step in the process of selection is:

Option 1 -> Job offer comes after selection decision is made but before the contract is finalized.

Option 2 -> Contract of employment is the formal legal document signed after job offer acceptance, completing the entire selection process.

Option 3 -> Selection decision is when the employer decides whom to hire, but precedes the job offer and contract.

Option 4 -> Reference checks occur earlier in the process, before making the selection decision.

Hence, Option 2: Contract of employment -> This is the final step where the formal legal agreement is executed between the employer and selected candidate, marking the official conclusion of the selection process -> correct