Which early river valley civilizations are marked with the letters a and b on this map?
choose the two correct answers.
a is china
a is egypt
a is indus valley
a is mesopotamia
b is china
b is egypt
b is indus valley
b is mesopotamia

A is Egypt  and  B is Mesopotamia

Explanation:

Along with ancient Egypt and Mesopotamia it was one of three early civilizations of the region comprising North Africa, West Asia and South Asia, and of the three, the most widespread, its sites spanning an area stretching from northeast Afghanistan, through much of Pakistan, and into western and northwestern India.

boundary is what it refers to hope this

explanation:

brainliest means the answer that is best and you found it very

if you ask any question and 2 persons gave you answer for your question and the answer of one person you liked the most and found it most the we can mark it as brainliest . at the side of every person's answer an option of brainliet then we can appericiate the user by marking it as brainlist

if someone marks our answer as brainliest then we can get ranks also

done.