Answer: A.an institutional review board
Explanation: An institutional review board (IRB) looks at a research proposal from the ethical point when it involves human subjects. The IRB after the rights and welfare of human subjects involved in experiments such as in clinical trials. It ensures that the privacy and human rights of these people are not violated.
It also has the power to weigh the benefit of such a experiment against the risks and approve or shut down a research. It can also suggest changes to the research/experiment as it sees fit.
Revolutions are organised social unrest that lead to a violent upheaval of the political system. They start usually due to economic factors - famine or poverty, weak leadership, and consolidation of opposition power into a popular movement.
B they are a Keystone species
keystone species
noun
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Answer:
A mountain is a landform that rises high above the surrounding terrain in a limited area
There are many benefits of working while at school, and they all include increasing your employability afterwards. This means that working while at school will help you to expand your contacts and references and it will help you gain new skills - so the correct answer is "all of the above".
