Why should an experiment be replicable?

Which description provides the best objective summary of the article in the passage?

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?