43. A. stable B. substance C. footprint D. amount
Read the following passage and mark the letter A, B, C, or D to fill in the blanks.
Plant and animal extinction leads to a loss of biodiversity. Maintaining biodiversity is
important (44)_______ us in many ways. For example, humans depend on species
diversity to have food, clean air and water, and fertile soil for agriculture. In addition, we
benefit greatly from the many medicines and other products that biodiversity (45)_______ .
Different conservation efforts (46)_______ in order to save endangered species. The Red
List - a global list of endangered and vulnerable animal species - has been introduced to
raise people’s (47)_______ of conservation needs. Governments have enacted laws to
protect wildlife from commercial trade and overhunting. A number of wildlife habitat
(48)_______ have been established so that a wide range of endangered species can have
a chance to survive and develop.
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