A i think is the correct answer
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.
I think the answer is D good Day now it’s D for sure have a good day
Increase energy as it falls
The second largest economic activity in Sub-Saharan Africa is farming
<h3>What is farming?</h3>
Farming refers to to the process of growing plants and animals.
There are two types of farming commercial farming and subsistence farming
commercial farming is the process of farming in large scale mostly using machineries while subsistence farming is a method of farming that is relatively small and hence di not require machines.
In sub-Saharan African mining is the major economic activity where countries like Nigeria depend more on extraction of mineral resources especially Gold and Oil.
The next after mining is farming
Learn more about sub-Saharan African here:
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