Find the part of the given sentence that has an error in it. If there is no error, choose 'No error.'
The health agency has encourage people around the world to wash their hands regularly.

Correct option is A

Option (a) contains an error.
Error identification: "Encourage" should be "Encouraged."
Grammatical Rule used: Present perfect tense requires the past participle form of the verb, i.e., "encouraged."
Corrected sentence: The health agency has encouraged people around the world to wash their hands regularly.
Meanings of all options:
Encourage: To give support, confidence, or hope to someone.
Encouraged: Past participle of encourage (correct form).
Regularly: At regular intervals or times.