Answer:
Brown rat and eastern gray squirrel
Explanation:
Atomic radii INCREASES when going DOWN a group because of more energy levels and DECREASES going ACROSS a group because of the increasing positive charge of the nucleus pulling in on the electrons.
An introduced species is a non native species that has one way or another been integrated into the native environment by human or other means.
An invasive species on the other hand is an introduced organism that has become detrimental to the local environment.
