diagraph a Read the following passage about ecosystems and mark the letter A, B, C or D to indicate the best answer to each of the questions from 31 to 40. Ecosystems across the world are facing severe threats due to human activities , and Viet Nam is no exception. []]]Ecosystems are delicate networks ofliving organisms interacting with their physical environment, and they;play a vital role in maintaining life on Earth. [II] In Viet Nam, ecosystems vary widely, from tropical rainforests to mangrove swamps and coral reefs. [III] Understanding the current state of ecosystems and the role humans play in their degradation is crucial to propose viable solutions for-long-term sustainability [IV] The current situation in Viet Nam reveals a worrying trend. Across the country, deforestation,water pollution, and biodiversity loss are increasingly common. Rapid urbanisation and industrialisation have led to the destruction offorests, rivers and wetlands. For example, in the Mekong Delta region agricultural expansion especially for rice and shrimp farming, has led to significant changes in the local ecosystem. These are damaging both natural habitats and local livelihoods. The over.extraction of groundwater and the useof chemicals infarming have resulted in pollution, which severely affects the quality of both water and soil. Additionally, the rise in sea levels due to climate change poses a threat to coastal ecosystems putting mangroves and other coastal habitats at risk. One example of a local ecosystem being impacted by human activities is the Cat Ba Archipelago, located in northern Viet Nam. Known for its rich biodiversity and unique limestone karsts, this area has seen considerable 'damage due to overtourism and illegal logging. The influx of visitors has led to water pollution, waste accumulation, and habitat disruption. Furthermore , illegal fishing activities have damaged coral reefs, and deforestation