Fill each blank with a suitable word to complete the passage below. The first letter is given. Human activity is a primary reason why many species are now (1) e_______________ and many more are endangered. The problem is that habitats are being (2) d_______________ not by one single event, but by a series of actions. One example is when people introduce (3) a_______________ plants or animals to a new environment where they have no natural predators. This risks disturbing the ecological (4) b_______________ in the area and kills native species. Humans also damage the Earth by cutting down forests for development and (5) a_______________ purposes. If this trend continues unchecked, the future of the (6) p_______________ will be a grim one indeed.

Fill each blank with a suitable word to complete the passage below. The first letter is given. Human activity is a primary reason why many species are now (1) endanger_______________ and many more are endangered. The problem is that habitats are being (2) d_estroyed______________ not by one single event, but by a series of actions. One example is when people introduce (3) a_llien______________ plants or animals to a new environment where they have no natural predators. This risks disturbing the ecological (4) b_alance______________ in the area and kills native species. Humans also damage the Earth by cutting down forests for development and (5) agricultủal_______________ purposes. If this trend continues unchecked, the future of the (6) planet_______________ will be a grim one indeed.

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