question: everything made by the nature - chemistry.
Capitalize this past sentence correctly.
A: Everything made by The Nature - chemistry.

question: his enigmatic disappearance has been puzzling to the egyptologists; many are rejecting that he was subject to an obvious conspiracy, and different hypotheses about his fate have been prevailing in turn.
Capitalize this past sentence correctly.
A: His enigmatic disappearance has been puzzling to the Egyptologists; many are rejecting that he was subject to an obvious conspiracy, and different hypotheses about his fate have been prevailing in turn.

question: open the formal.assessment (initial).winsat file in excel by right clicking the file and choosing open with -> excel
Capitalize this past sentence correctly.
A: Open the Formal.Assessment (Initial).WinSAT file in Excel by right clicking the file and choosing open with -> Excel