Natural selection is a process by which organisms that are better adapted to their environment tend to

Natural selection is a process by which organisms that are better adapted to their environment tend to have greater reproductive success. That is, those that survive, or those that better support the conditions of the environment, are those that can reproduce and provide offspring and thus perpetuate the species.

feral cats are estimated to eat tens of millions of native animals each night in australia

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.