Magnetic reversals . cause the movements of tectonic plates

provide strong evidence for sea-floor spreading

have never occurred during geologic time

confirm the existence of subduction zones

Provide strong evidence for sea floor spreading

Explanation:

Occurs when the poles of the Earth flip. The iron-rich outer core creates the Earth's magnetic field. This field isn't constant.

B provides strong evidence for sea-floor spreading

Explanation:

Hope it helps

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

no questions on whether they are allowed that right