Natural changes to the ecosystem refer to environmental phenomenon that occur naturally. Natural changes include floods, volcanic activity, hurricanes, droughts, and earthquakes. They can be destructive, but they also have advantages.
The benefit of the flood is for example providing nutrients to the soil that were lacking. Also t<span>here may be relocation of fishes and organisms living in water bodies, which improves the ecosystem.
Volcano threatens t</span>he people and animals in the area are threatened, but is has also some advantages, for example:<span>the soil becomes rich due to the nutrients from the volcano.
</span>Hurricanes result in the destruction to infrastructure and loss of lives, vegetation, and livestock. The advantage is that it lowers the temperature and t<span>he wind will cause the topsoil to be distributed to areas in which it was lacking.</span>
A cognitive psychologist conducts a study to examine differences in cognitive functioning across stages of adulthood. He opts to study one group of young adults ages 21-28. one group of middle-aged adults aged 41-48, and one group of older adults ages 61-
68- The psychologist finding that that the middle age group outperforms the older group is a valid criticism to the study's conclusion
Explanation:
A cognitive psychologist concludes that age relates to cognitive performance on these tasks.This statement means that as a person age's its ability to perform the cognitive task declines .In the study conducted between the various age group the cognitive psychologist where able to find that the people in their middle age (i.e. between 41-48) were able to perform the cognitive task is a better way than the people in the older group. and the younger group was able to perform the cognitive task much better than the middle and the old age group.
Now their is no need for the comparison of the middle age and the old age people for performing the task because as er the conclusion the cognitive skills decline with the age.
So,the psychologist finding that that the middle age group outperforms the older group is a valid criticism to the study's conclusion
