The correct answer is C because 'environment' is the comprehensive ecological term encompassing all external conditions (living and non-living) surrounding and affecting an organism - including place, people, things, and nature as mentioned in the question. Option A (lithosphere) refers only to the Earth's crust, B (surrounding) is grammatically awkward and not standard terminology, and D (biotic resources) includes only living things, missing the abiotic components that are also part of the environment.