Scientists have watched the formation of tornadoes and have determined that this kind of wind shear and instability usually occurs where?

A) within a mesocyclone
B) ahead of a cold front and low pressure system
C) when a warm front is overcome by an arctic front
D) behing a high pressure system moving across the country

no

explanation:

since the earth is flattened at the poles and bulges at the equator, geodesy represents the figure of the earth as an oblate spheroid. the oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis.

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì