Some of the natural defenses that human bodies have to help keep pathogens our include cilia tears and skin
Answer:
Economic, political, and social issues merge with circumstances of modernization to make people want to migrate from rural to urban areas.
Explanation:
Answer:
~13.7
Explanation:
Big bang theory is the best theory which explains how this universe came into being. This theory gave an approximate date of the universe and how it is formed. The explanation is given by observing the movement of galaxies away from our own and they all have originated from ancient singular sources of very high temperature and density. Although there exist many questions to answer, big bang theory is the most acceptable theory till now.
