3. A. ethnic groups living in the United States retain unique features, but also contribute to American culture as a whole.
4. D. constitutional monarchy
5. B. the dispersion of Africans during and after the trans Atlantic slave trade.
Assimilation is a process in which one minor group loses its particularity and takes on the cultural and other differentiating features of a major group such as speech, mannerisms, values, practices and ideology. When this process is complete, there is full integration in which there will be no identifiable difference between the previous different groups. The process of assimilation may be voluntary or enforced upon someone, and it may occur slowly or quickly.
Wastewater from fracking operations is injected into porous rock formations, which can induce seismic activity.
Explanation:
The environmental concerns of the fracking can be linked to the increase of the potential for the oil spills that harm the coil and the surrounding vegetation and can cause the earthquakes due to the high pressure that is used to extract the oil and the gas from the rocks and storage of the excessive wastewater on site.