The correct answer is: b) Collect information through a questionnaire.
During the second phase of the census, enumerators visit households to collect information through a questionnaire. This information is used to create a profile of the population, which is used for planning and decision-making. The questionnaire typically includes questions about age, sex, race, ethnicity, marital status, education, employment, and housing.
Option a) is incorrect because enumerators do not distribute pamphlets during the second phase of the census. Pamphlets are typically distributed during the first phase of the census, which is when households are notified of the census and asked to complete a questionnaire.
Option c) is incorrect because enumerators do not offer medical check-ups during the second phase of the census. Medical check-ups are typically offered by doctors or other healthcare professionals.
Option d) is incorrect because enumerators do not conduct voter registration during the second phase of the census. Voter registration is typically conducted by election officials.