The otters (secondary consumers) have what type of effect on the kelp (producers) population?

A. positive indirect effect
B. negative direct effect

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.