Not a scientific answer, but because they are immature.
Answer:
d) correlational research
Explanation:
Because of the number of people in this study, researches have enough evidence for settle a relation among helping in different situations.
Correlational studies, are used in psychology to relate two or more variables. In this case, how is the behavior or disponibility of men and women in front of different events like helping animals, people in street, people in danger, etc.
Answer:
1) circulatory and respiratory
2) endocrine
3) circulatory
4) circulatory and nerves
Explanation:
I think these are right. Sorry if they are not.
True! Mosquitos can carry the malarian disease! (: good luck, I hope you pass!
