Concepts: exposure, station, train
A: time exposure as a commuter train leaves a suburban train station in the evening
Concepts: bark, giraffe, tree
A: Head of two giraffes with one slicking the bark on a tree.
Concepts: boulder, flow, motion, rainforest, stream
A: stream flowing in slow motion among boulders through montane rainforest at elevation
Concepts: dentist, patient, treatment
A:
dentist doing a dental treatment on a patient