托福听力official32 According to paragraph 1, how does disturbance of a site influence its colonization by a plant species? 答案解析

用题干关键词"disturbance"定位到第1段第4句话：Success in colonization depends to a great extent on there being a site available for colonization – a safe site where disturbance by fire or by cutting down of trees has either removed competing species or reduced levels of competition and other negative interactions to a level at which the invading species can become established. 这里说了，通过火灾和砍伐的干涉要么消除竞争对手要么降低竞争的强度。这和A选项中的eliminates competition呼应。B选项的increase negative interations和原文reduced other negative interations相反，所以错；C说反；D在原文无提及。