How many questions do I have to answer before i am allowed to message people

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

When belgium gained independence from the netherlands, tensions grew between the walloons and the flemings over a. language b. land c. relations with france d. relations with the netherlands