Dolphins mainly use their names when they are travelling to _______ other dolphins in their group know where they are.
Whales use sounds to communicate with one another , _______ others where food is available for example.
Wood frogs ______ to survive with more than 60% of their body freezing for as long as 2 weeks.
A house cat could ______ superstar runner Usain Bolt in the 200-metre dash.