The dividing line on land between europe and asia is the:
iberian peninsula
ural mountains
panama canal
baltic sea

THERES A QUICK ANSWER:
The four geographical boundaries that divide Europe from Asia are the Bosphorus, the Dardanelles, the Caucasus and the Ural Mountains. Together, these four boundaries create a geographical line that stretches extends north to south through the western quarter of Russia, goes around the western boarder of Kazakhstan and the Caspian Sea, and runs east to west along the northern border of Turkey and Azerbaijan.

It’s either c or d as the answer.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.