Put the words in brackets into the correct form 2. When a seal surfaces to _________________, the polar bear uses its legs to smack on the head of the seal then bites it on the neck and drags it onto the ice. (BREATH) 3. Polar bears could become nearly _________________ as a result of shrinking sea ice in the Arctic. (EXTINCTION) 4. Climate change, and the loss of sea ice habitat, is the greatest _________________ to polar bears. (THREATENING) 5. The melting of the Arctic sea ice threatens polar bear __________________. (SURVIVE) 6. We can all contribute to reducing climate change, and therefore help polar bears and other ___________________ species. (ENDANGER)