Sai, who is from japan, can easily tell whether another asian person appears to be from china or thailand. however, he has trouble distinguishing among white people and thinks they all look basically the same. this is due to what psychological tendency?

This is the so-called cross-race effect, or cross-race bias. It´s easier for us to recognize the faces of people of racial groups we are familiar with than to recognize the faces of people belonging to other cultures. We see the example here, Asians will more easily recognize other Asian people´s faces that faces of European people. And viceversa, many white people go to Asian countries and they have difficulties in telling faces one from another in the beginning. Only after you have spent some time, maybe one month or two months, you start telling differences which, of course, exist everywhere.

Explanation:

the aksumite empire was an ancient kingdom located in what is now northern ethiopia from the period of 100 ad to 940 ad. its capital was the city of aksum. the kingdom established itself as one of the 4 great powers at its time, along with persia, rome, and china.

the kingdom was rich in goods like gold, iron, and salt. it established strong commercial ties with the regions governed by rome, egypt, and persia (arabia). aksum was a key location in this commercial network. trade was also facilitated with the introduction of the aksumite currency.