다음 글의 밑줄 친 부분 중 어법상 틀린 것은?Rice stalks l… | [법원직 9급 영어] 19년 1회차 기출문제 상세 페이지

다음 글의 밑줄 친 부분 중 어법상 틀린 것은?
Rice stalks lower their heads when they are mature and corn kernels remain on the shoots even when they are ripe. This may not seem strange, but, in reality, these types of rice and corn should not survive in nature. Normally, when they mature, seeds should fall down to the ground in order to germinate. However, rice and corn are mutants, and they have been modified to keep their seeds ①attached for the purpose of convenient and efficient harvesting. Humans have continuously selected and bred such mutants, through breeding technology, in order ②for these phenomena to occur. These mutant seeds have been spread intentionally, ③which means that the plants have become artificial species not found in nature, ④having bred to keep their seeds intact. By nurturing these cultivars, the most preferred seeds are produced.
*germinate 발아하다 **cultivar 품종

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