Answer:
the number of student interactions
Explanation:
Based on the information provided within the question it can be said that the effect that is being described is that of the number of student interactions. This can be said because it seems that larger rooms have more enthusiasm because there are a far greater amount of students and thus there are more interactions among the students as opposed to a smaller room with less students.
Answer: Can differ in different ways
Explanation: Race and class can affect education in a number of ways. An example is those people who come from minority groups. People who are minorities are more likely to have a history of relatives who have not reached a higher level of education. Those families that have not had access to education can influence the child to continue on the same path.
Also, people from minority groups may have greater difficulties in accessing education since these groups in various countries are often neglected.
Answer: Sex ratio
Explanation: The sex ratio or the gender ratio, as some argue, because according to some scientists these two terms are not interchangeable, is the ratio between the number of men and the number of women in the population. This ratio varies and depends on the type of society, i.e. it depends on economic, social, cultural, biological and technological conditions. The ratio of genders in the population, that is, the number of men and women can be affected by migration, higher mortality in some of the gender, as well as the average length of the life of the genders.
I believe the answer is D) 158. Thanks