During an eclipse of the sun the high ocean tides on earth are

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

Name one type of data that h-r diagrams do not show.

What was apartheid and how did it restrict the rights of non-whites?