Please help its really easy!! "To make sure they would have eternal life, pharaohs built fabulous tombs for themselves."

Which part of this is a fact?

Which part of this statement is an opinion?

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

i think it was   tsar alexander ii