Seamounts are. a) volcanoes that form on the ocean floor
b) a special type of oceanic trench
c) submarine canyons found near Australia

A

Explanation:

Seamounts are underwater mountains that rise hundreds or thousands of feet from the seafloor. They are generally extinct volcanoes that, while active, created piles of lava that sometimes break the ocean surface.

a

Explanation:

seamounts are underwater mountains that rise hundred or thousand of feet from the seafloor. They are generally extinct volcanoes that, while actve, created piles of lava that sometimes break the ocean surfaces

i am a little confused myself with what goes with the letters and what goes with the numbers but ill do my best to you

the cordillera states and grand canyon are along the southwest u.s. and northern mexican pacific.

the great plains and southwest desert are also the prairie and home to many earthquakes too .

the coastal plains have poor soil and many factories started in the south.

is this what u needed? if not i can see what i can do

the correct answer is c.