They are dangerous to the environment because they have no natural competition. That being said they have nothing to keep their population in check, therefore, taking away food, and habits from all the other species. Thus, causing species to die out, which in turn ruins the food chain.
A single older adult who has been
losing weight involuntarily may benefit from participation in a
congregate meal program.
To add, Congregate<span> and Home
Delivered Meals is an
individually designed service which provides meals to waiver
participants who cannot prepare or obtain nutritionally adequate meals for
themselves.</span>
"Mechanical" would be the kind of reproductive isolation among the choices given in the question that has been observed in these two species. The correct option among all the options that are given in the question is the first option or option "A". I hope that the answer has come to your help.
Answer:
even me I don't kno haha lol
D. Kidney and bladder are the 2 organs that are part of the excretory system.