Explanation:

- Priced: This option implies setting a value on something. It is not applicable here as we are talking about appreciation, not valuation.

- Prized: This term means to value or regard something highly. It’s usually about objects or achievements rather than actions or people. Thus, it doesn’t fit well here.

- Praised: This is the correct option. To praise someone means to express approval or admiration for their actions or qualities. It’s the right word to use when talking about acknowledging someone's hard work.

- Prayed: This involves communicating with a deity or spirit and is irrelevant in this context.