Question

what are the flattest and smoothest regions of the world​

Answer 1

Answer:

abyssal plains

Lying between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface. They are among the flattest, smoothest and least explored regions on Earth.

Explanation:

Answer 2

Answer:

Abyssal plains

Explanation:

Because the layer Lying between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface. They are among the flattest, smoothest and least explored regions on Earth.