Answer:
things in economy and life change over time
Explanation:
Cross sectional studies is the correct answer.
Cross-sectional research is used to examine participants' behaviors of different ages at one point in time. These studies are useful for a variety of reasons: data collection can be proceeded rapidly, the cost is a lot lower than a logitudinal research since there is no need to keep contact and follow-up with participants as time passes, and because of that practice effects are not a problem. On the other hand, the principal limitation of this research is that the results produce information regarding age-related change, instead of development per se.
Answer: Object permanence
Explanation: Object permanence refers to the mental ability of a child to know or belief that an object continue to exist even when they can no longer be heard, seen or felt. At the very early stage of a child, they seem to belief that once an object can no longer be heard or seen, then such objects has seized to exist. Such that when an object is hidden from a child view or taken out of sight, they belief such object has disappeared because they lack the mental ability to realize that maybe the object was hidden or kept away from them.
Answer:
The Vikings of Norway are the first Europeans known to have visited North America (u.s.)
Πir happend when they were looking for frogs and living with the grandma
