The Amazon rainforest produces around 20% of the world’s oxygen and is home to a wide variety of plant and animal species. However, deforestation threatens its survival, which could lead to drastic climate changes globally.
Question: The Amazon rainforest is responsible for generating about ____ of the Earth’s oxygen.
Answer: 20%
Explanation: The text explicitly states that the Amazon rainforest produces around 20% of the world’s oxygen, making this the correct answer.
Wind turbines are becoming more popular as a source of renewable energy. They convert wind power into electricity without emitting harmful pollutants, which makes them an environmentally friendly alternative to fossil fuels.
Question: Wind turbines produce energy without releasing ____.
Answer: harmful pollutants
Explanation: The text mentions that wind turbines generate electricity "without emitting harmful pollutants," indicating that "harmful pollutants" is the correct answer.
Many people now prefer online shopping because it is more convenient and offers a wider variety of products. Unlike physical stores, online shops are accessible at any time of the day, allowing consumers to shop at their convenience.
Question: Online shopping is often preferred because it is more convenient and has a ____ of products.
Answer: wider variety
Explanation: The text states that online shopping "offers a wider variety of products," which completes the sentence correctly.
Polar bears are increasingly threatened by the effects of climate change. As the Arctic ice melts, they struggle to find sufficient food, leading to a decline in their population.