What is the definition of energy? heat from the sun it can be anything and everywhere food and water the ability to do work

It's the ability to do work

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

i believe your answer would be c.. : )