Final answer:
Immigration is more likely to occur into a sink population, where the birth rate is lower than the death rate and the population relies on the inflow of individuals from other populations to sustain itself. option 3 is the correct answer.
Step-by-step explanation:
In relation to populations in ecological dynamics, a sink population is one where the birth rate is less than the death rate and the population is maintained by immigration from other populations, while a source population has a birth rate higher than the death rate and can provide individuals to other populations through emigration.
When we compare the two types of populations, it is more likely that immigration occurs more into a sink population. This is because sink populations are often sustained by the influx of new individuals from source populations to compensate for their lower birth rate.
Conversely, a source population is characterized by a positive "r value," suggesting that its growth rate is greater than zero and the population is increasing in size. Therefore, it is less likely for a sink population to have a positive "r value" than a source population. Lastly, sink populations may not necessarily live in more desirable habitats, as they could exist in environments that are not capable of supporting positive population growth without immigration.