20 ! more than one

why are invasive species considered a threat to native wildlife?

they can breed and spread quickly.
they consume native species’ food supply.
they evolve, and native species don’t.
they all have higher genetic diversity than native species.
they don’t need resources from the environment as native species do.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.