As for Mr. Tanaka, than Mr. Suzuki, much, height as subject is tall. [Syntax]

The correct answer is "たかい" (takai). This is an い-adjective meaning "tall." It describes the height ("せ") and completes the common phrase "せがたかい" (se ga takai), meaning "to be tall." It should be followed by the polite copula "です." "せ" (se) is the noun for "height," part of the idiom "せがたかい." "が" (ga) is the subject-marking particle for "せ." "です" (desu) is the polite copula, which comes at the very end to make the sentence polite.

正解は「たかい」です。い形容詞で「背」を修飾し、「せがたかい」という表現を完成させます。その後ろに「です」が続きます。「せ」は名詞で「背が高い」の一部です。「が」は「せ」の主語を示す助詞です。「です」は丁寧語の助動詞で、文の最後に続きます。