What is the most important reason that christianity is so geographically widespread?
a. the emigration of christians to non-christian areas around the world
b. the conquest of non-christian areas by christian colonial powers
c. trade between christian nations and nations of other faiths
d. the increased availability of new technology and forms of communication

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.