Science Essay Grammar Refinement -- 2

I have drafted a science-focused academic essay and now need its grammar, punctuation, style, and overall flow tightened to meet scholarly standards. The content and technical terminology should stay untouched; the task centres on polishing sentence structure, smoothing transitions, fixing tenses, and rooting out any lingering inconsistencies or ambiguities. When you finish, please return two files—one showing all edits with tracked changes and a second clean version ready for submission.