Please help me no one is helpingg

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

Under which condition below would u expect a coarse-grained intrusive rock like diorite to form?

Which event had the greatest impact on culture of south america