I think what they want is for you to add more details. For example,The boys played football,you could say Jim and Tom play football every night before dinner.
Crater lake if you meant Oregon
Answer:
apartheid
a policy or system of segregation or discrimination on grounds of race.
Answer:
c.cross-sectional
Explanation:
Cross-sectional study is a kind of research which compares different population groups at one specific point in time.
Here, the researcher compares three population groups (first grade, third grade, and sixth grade of elementary school). By using this method, any differences between age groups regarding reasoning ability can be related to age differences not something that happened over time.
