Final answer:
During vesicle fusion, the energy and strain change in relation to the SNAREs.
Step-by-step explanation:
During vesicle fusion, the energy and strain change in relation to the SNAREs. SNAREs are proteins involved in vesicle fusion. When V-SNARE proteins on the vesicles bind to complementary T-SNARE proteins on the receiving membranes, the membranes fuse. This fusion process requires energy and generates strain.