The correct answer is option 1), i.e. criticize. Praise: (verb) to express warm approval or admiration of.Let us try to find the meaning of the words given in the optionsCriticize: (verb) to indicate the faults of someone or something in a disapproving way.Worship: (verb) to have great admiration or devotion shown towards a person or principle or a deity.Favour: (verb) to feel or show approval or preference for.Ignore: (verb) to refuse to take notice of or acknowledge or disregard intentionally.Clearly, the word opposite to the word "praise" has to be option 1), i.e. "criticize".