The balkan countries are bordered by these seas. select all that apply.

adriatic sea
aegean sea
black sea
ionian sea
tyrrhenian sea
white sea

These 4 Adriatic Sea, Aegean Sea, Black Sea, Ionian Sea

Adriatic Sea Aegean Sea Black Sea Ionian Sea

Explanation:

The seas that originated with black areas are those of southeast Europe. And those that have originated from the Balkan mountains and the Balkan mainlands.  Claims to be bordered by the Adriatic sea, on the northwest and the Ionian Sea on the southwest. The Mediterranean sea includes the Aegean and the Ionian sea. It stretches from the Adriatic sea to the black sea. The total landmass has an area of 470,000 km square.

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.