Answer:
d. cross-sectional study
Explanation:
In research, a cross-sectional study consists of a gathering of data from a population or a subset of the population we want to investigate at an specific point of time. In other words, the data will give us an idea of what's happening within a group in a particular moment in time.
In this example, the researcher gives 20-year-olds, 40-year-olds, and 60-year-olds a questionnaire. He wants to know if older people are calmer than younger ones. We can see that <u>he wants to know what's happening within this groups (the 20 year-olds, the 40's and the 60's) during this particular time of their life </u>and therefore determine if the 60 year-olds are calmer. Therefore this is an example of cross-sectional study.
Answer: The fact that their brain activity revealed that they recognized the sounds they had heard while asleep indicates that the infants learned the sounds they had heard while asleep.
Brain activity revealed that they recognized the sound while asleep and also the only time the sound was played was when they were nappin. Obviously, the sound was learned while asleep.
Answer:
The last one,Hamamoto's work offers opportunities to people of all abilities.
Dull: bland, boring
Brilliant: amazing, revolutionary
Doleful: sad, depressed
Vivid: clear, precise
By using lands to farm millet, wheat soy beans cucumbers bok choy. The Chinese would use the rivers that run through the plaines to fish, feeder cattle and travel up and down the rivers and boats
