Possibly yellow fever can't confirm for sure
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The correct option is robin. Scientists usually draw survivorship curve to determine the pattern of mortality and survival in different species. The graph usually show three basic patterns, some species produce a lot of offspring but only a few survive to the stage of active reproduction, some produce a small number of offspring but a large number of them survive to adulthood while the rest of the species are intermediate and have a fairly constant rate of mortality and survival. Robin falls into this last group.
Answer:
A particular population limiting factor or factors must have been removed
Explanation:
The population of the birds must have been kept between 30 and 50 individuals by population limiting factors such as the presence of predators within the community or competition for resources such as food or spaces.
For the population to shoot up to 90 all of a sudden, it may be that one or more of the population limiting factors has been removed from the population. <u>It could be that a major predator has been removed from the community or the competition for food/space is now significantly reduced due to more food/space in the community. </u>
