River ecosystems need a delicate balance of environmental factors to thrive. Which sentence from the article BEST supports the statement above?

Group of answer choices

A third of U. S. rivers have significantly changed color over the last 36 years, turning from blue to yellow and green, striking new images reveal.

"Sediment and algae are both important, but too much or too little of either can be disruptive," Gardner said.

In the North and West, rivers tended to become greener, whereas the eastern regions of the U. S. had a trend toward yellow rivers.

"You could totally see these trends going back in the other direction," Gardner said, "especially if the change is occurring due to local mismanagement that is easily fixed."

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons