posted by MAcy .
This graph shows the changes in two populations of herbivores in a grassy field.
In the y axis it says number of organisms
in the x- axis it says Time
In the graph A is decreasing , B is increasing, At first they were steady then slightly A decreased and B increased .
A possible reason for these changes is that
(1) all of the plant populations in this habitat decreased
(2)population B competed more successfully for food than population A
(3) population A produced more offspring than population B
(4) population A consumed members of population B