Which of the following changes to waterways is only the result of human activity? a) erosion b) temperature fluctuations c) flooding d) deposition of sediments on floodplains e) chemical pollution

The correct answer is - E) chemical pollution.

The waterways can be influenced by both, nature and the human activities. While the mother nature has lots of influence on the waterways in multiple different ways, the human activity seems to have even more attributes at its sleeves. The humans create a lot of pollution, and the water suffers a lot from it, thus the waterways as well, and one of these pollution types is the chemical one. The chemical pollution comes from the manufactures chemicals or chemical waists that go into the water. They change the composition of the water, its biosphere, its functioning, and as an end consequence comes the change of the waterways as well.

is the art and science of cultivating the soil, growing crops and raising livestock. it includes the preparation of plant and animal products for people to use and their distribution to markets.

agriculture provides most of the world’s food and fabrics. cotton, wool, and leather are all agricultural products. agriculture also provides wood for construction and paper products.

these products, as well as the agricultural methods used, may vary from one part of the world to another.

light-year  

the distance that light travels in a vacuum in one year, equal to about 9.46 trillion km (5.88 trillion mi). light-years are used in measuring interstellar and intergalactic distances.  

parsec  

a unit of distance used in astronomy, equal to about 3.25 light years (3.08 × 1016 meters).  

parallax  

the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due to its being observed from the earth instead of from the sun (annual parallax or heliocentric parallax)  

absolute magnitude  

the magnitude (brightness) of a celestial object as it would be seen at a standard distance of 10 parsecs.  

apparent magnitude  

the magnitude of a celestial object as it is actually measured from the earth.  

redshift  

an increase in the wavelength of radiation emitted by a celestial body as a consequence of the doppler effect.  

the great thing about your imagination is that it doesn't have to make sense! if i were you i would be stuck in space, no communication with earth travelling around and around, you can only guess how long its been since your communication broke down. you land on an undiscovered planet, you do a scientific investigation examining the elements and conditions. you come across alien lifeforms.  

best of luck!