What is the difference between construct validity, internal validity, and external validity?

Is that internal validity refers to the structure of a study and it's variables while external validity relates to how universal the results are.

Explanation:

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

answer; quantitative versus qualitative research;