Which term is best described as a flat expanse of ocean floor?

a. continental shelf
b. abyssal plains
c. guyots
d. deep sea trenches

The correct answer is (b) Abyssal plains

The flat expanse of ocean floor at the bottom of the sea is called abyssal plain which accounts for about 79% of the sea floor worldwide. It is the smoothest surface on the planet with less than 5 feet of vertical variation, that is most common in Atlantic.

Example: Largest Abyssal plain is Canary Abyssal

the correct answer is abyssal plains. Hope this works!

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.