Answer:
D. physical boundary
Explanation:
Google the himalayas as borders in south east asian countries, you'll clearly see that they exist as physical boundaries between nations such as Nepal and China.
Answer:
There was a civil war between Kublai and his younger brother.
Explanation:
please mark brainiest
Answer:
If the volume remains the same while the mass of a substance increases, the density of the substance will increase.
Explanation:
They both will increase so in that case they will remain the same or together.
Hope This Helps!
-Justin