Ablack sand beach would be considered part of which sphere?
a. geosphere
b. cryosphere
c. hydrosphere
d. biosphere

It'd be considered a part of the geosphere.

Here's all of their definitions though:

Geosphere: any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere.

Cryosphere: The cryosphere is the frozen water part of the Earth system.

Hydrosphere: all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds

Biosphere: the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.

Probably the hydrosphere altough I'm not positive

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )