Answer:
The ring of fire is an area around the pacific ocean where there is a lot of volcanic activity
Explanation:
Option D is correct.
A synapse is the opening between neurons that neurotransmitters pass through.
Are a class of lipids whose molecule has a hydrophilic "head" containing a phosphate group, and two hydrophobic "tails" derived from fatty acids, joined by an alcohol residue. ... They can form lipid bilayers because of their amphiphilic characteristic.