Question

how Polythene bags can be harmful for animals​

Answer 1

Tens of thousands of whales, birds, seals and turtles are killed every year from plastic bag litter in the marine environment as they often mistake plastic bags for food such as jellyfish. Plastic bags, once ingested, cannot be digested or passed by an animal so it stays in the gut.

Answer 2

because

they eat the polythene bags and that u can say it harmful for animals