What changed about the river valley civilizations as they rose and fell ? a. the environment b. the actual water formations c. the religion

richard nixon led the investigation that resulted in alger hiss being convicted of prejury.

pan-africanism or pan-africanism is a political, philosophical, cultural and social movement that promotes african twinning, the defense of the rights of african people and the unity of africa under a single sovereign state, for all africans, both africa as of the african diasporas.

explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.