この山の高さはどのくらいですか。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

mountain; hill; mine (e.g. coal mine); heap; pile; crown (of a hat); thread (of a screw); tread (of a tire); protruding part of an object; climax; peak; critical point; guess; speculation; criminal case; crime; mountain climbing; mountaineering; festival float (esp. one mounted with a decorative halberd); wall; wall tile; temple; temple grounds; wild

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

high; tall; expensive

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

which; what (way)

approximately; about; around; or so; to (about) the extent that; (almost) enough that; so ... that ...; at least; as ... as ...; like

be; is

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way