Answer:
152.4 km each side of these ocean basins spread during the past 1 million years.
Explanation:
- The mid Atlantic ridge is spreading at a very fast rate and its due to the spreading of lavas on the either side of the oceanic plate it continues to expand, the ocean spread at a speed of 3-6 inches in a year and thus the axis to the beginning of the yellowish polarity.
<span>Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains.</span>
The defined as the level of biodiversity

The Correct choice is C
<u>Demography</u> is the study of human populations and how they grow or decline.