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A perennial river can be defined as a river that is <u>continually flowing </u><u>throughout the </u><u>year </u><u>in at least some parts. </u>
A lot of rivers tend to dry up in the dry seasons because the supply of water from rain would be gone.
Perennial rivers:
- Are capable of flowing all year round.
- Include examples such as the Nile, the Mississippi, and the Amazon.
In conclusion, a perennial river is continuously flowing.
Find out more on benefits of perennial rivers at brainly.com/question/1152007.
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.
The correct answer is c. water freezes in a crack in a rock.
The water freezes which makes its volume greater so it breaks the rock so then the water thaws and then new water comes, even more of it, so it freezes, and so on and so forth until the rock breaks completely.