In an aquatic habitat, an example of organisms from the pioneer community would be - f water reeds g algae h water lilies j grass

Algae

Pioneer community can be refers to a community of spices that first colonize an area during primary succession. This group of organisms are among the first to arrive at a new site and perform a unique services by preparing a habitat for later species.  

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.

a physical change is being made.