Vocabulary in Context Practice Test

Mateo visited a rainforest ecosystem on a school trip. He saw tall trees, vines, and bright frogs. A guide explained that rainforests have great biodiversity because so many species live there. The class also talked about conservation. The guide said conservation means taking care of the forest, like using less paper and protecting habitats, so animals can keep living there. In the passage, what does the word conservation mean?

In a desert ecosystem, Amina noticed many living things sharing space. Cactus plants stored water in thick stems, while lizards hid under rocks. After a rare rain, tiny flowers bloomed and insects appeared. Birds arrived to eat the insects, and the lizards hunted too. Amina wrote that this place had high biodiversity, meaning many different kinds of plants and animals. She also learned about conservation, which helps protect nature so it stays healthy. What is the meaning of biodiversity as used in this context?