Challenges unique to urban areas can be a high urban poverty level, a rapid rise in population, and inadequate basic services (such as dirty water).
Answer:
1, 4 & 6 are likely to be correct
Explanation:
1 When the target group is American adults, who very often have landline telephones and cellphones, it can be argued that including them will be more accurate.
4 This may be true; I can imagine that there are people, socioeconomically different, who don´t have (access to) landline phones.
6. Birthday doesn´t have anything to do with age, as suggested in nr. 5 and nr. 7. Birthyear does. The selection of most recent birthday in a household is a good way of selecting at random.
2, 3 and 8 are statements that don´t have any scientifical reasoning.
When people get too much power and dont know how to control it then the best gets them and they arent able to be a successful leader.
Why do people settle near river? The land along the rivers is fertile. If there is fertile land, then crops can be grown. Animals can also be raised if there is enough food and water for them. People learned that they could stay in one place and grow enough food to feed their community, if they were near a water supply.
