Why are otters killed by pollution?

Otters are often killed by pollution due to the harmful effects of toxins in their environment, which can accumulate in their bodies through the food chain. Contaminants like heavy metals, pesticides, and plastics can lead to health issues such as weakened immune systems, reproductive problems, and diseases. Additionally, pollution can deplete their food sources, making it harder for otters to find adequate nutrition. These factors collectively threaten otter populations and their habitats.