One of the pieces of evidence the student selected was: When the population of the salmon drastically decreases around 1995, then the orca whale population also starts to decrease. Explain the reasoning for why the populations would change in this way. Use vocabularies such as consumer population, resource population, predator, prey, energy storage molecules, and population size.

Ithink it is c ,i hope i you

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

Answerfalls,rises

A.throttle body— mounted regulator