Answer:
c. pollution
Step-by-step explanation:
Currently, the biggest reason for the destruction of wetlands is the pollution that came from our consumer product. Most People contributed to this destruction without we even realizing it. For example, when we use product with non-environmental friendly chemical and dump it to sewers, some of its components passed through our sewer and ended up in wasteland. The chemicals can destroy the Biodiversity within the wasteland.
Scientists have estimated that around 64% of the world's wasteland has disappeared ever since the rise of factory product consumption in early 1900s.