Under the influence of gravity, over time the dense central part of a galaxy will do what?(1 point)

expand

stay as it is, forces balanced

stay the same size but spin more slowly

contract

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting