Answer:
A i think, sorry if im wrong.
There are three main reasons why people are concerned that cell phones (also known as “mobile” or “wireless” telephones) might have the potential to cause certain types of cancer or other health problems:
Cell phones emit radiofrequency energy (radio waves), a form of non-ionizing radiation, from their antennas. Tissues nearest to the antenna can absorb this energy.
The number of cell phone users has increased rapidly. As of December 2014, there were more than 327.5 million cell phone subscribers in the United States, according to the Cellular Telecommunications and Internet Association. This is a nearly threefold increase from the 110 million users in 2000. Globally, the number of subscriptions is estimated by the International Telecommunications Union to be 5 billion.
Over time, the number of cell phone calls per day, the length of each call, and the amount of time people use cell phones have increased. However, improvements in cell phone technology have resulted in devices that have lower power outputs than earlier models.
<span>The correct answer is : C.
Botswana.</span>
Botswana is a topographically flat country wherein 70
percent of its territory is the Kalahari Desert. Because Botswana is bordered
by South Africa to the south and southeast area of its territory and by Namibia
to the west and north territory, minimal land areas of both countries are included
in the 900,000 square kilometer land area of Kalahari Desert.
Kalahari Desert also encroached on some parts of Zambia but
no part of Mozambique.
