How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater

The vacuole would quickly shrink in size as water would leave the amoeba because of a higher salt concentration outside the cell.

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.