Disease
Lack of natural reourses
war
asteroid
Polution.
Answer:
The climate of the earth throughout history has always been <em><u>fluctuated between hot and cold periods. </u></em>
Development of the Embryo. The next stage in development is the embryo, which develops within the amniotic sac, under the lining of the uterus on one side. This stage is characterized by the formation of most internal organs and external body structures.
Answer:
Qualitative, Quantitative, Qualitative, Quantitative, and Qualitative.
Explanation:
