If the analysis of a sample from a fossil reveals that 28% of the original amount of its carbon-14 remains, how many half lives must have gone by?

it should be all of them because it asks if you included all of those in your answer

explanation:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

the awnser is group 12

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101