Ecosystems are kept in check by

i don't know. if i were you, i would search it up online : d

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.

geologic time scale (for gradpoint) =)

the correct answer was location c, because earth is tilted away from the sun at this time