Emma was born in Topeka, Kansas in 1948. Gerontologists would place Emma in the category of and consider her a member of the birth cohort.

young-old; Baby Boom

Explanation:

Gerontologists are professions who study people or society in connection with ageing. They have classified older lives into stage groups which are

1. Young-Old: individual between 65 to 74 years old

2. Middle-Old: between 75-84 years old

3. Old-Old: individual over 85 years old

Therefore Emma is still between the Young-Old age groups. And a member of baby boomers born between 1946‐1955.

Option a==> young-old; Baby Boom.

Explanation:

Describing old people with respect to their ages can be done by dividing old ages into categories. The main three categories are; young- old, middle-old and old- old or very-old. Young old are people that falls into the age groups of 60 years old to early 70s, middle-old people falls between the age group of 75 to early 80s and very old adult falld are people from 85 and above. And with that, Emma is 72 years old(2020 - 1948).

People that falls into the Young old age group can still do some things without depending on others.

If you look at the question again we can seey the Emma was born in 1948, in in Topeka, Kansas. This is the period known as the baby boom generation or baby boomers. The baby boomers are the people that were born between the years of 1946 and 1964.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.