Natural instinct

Elephants are known to escape into the (a)   when they feel a tidal wave

Elephants can sense change through (a)   in their feet

Some forest fires have travelled up to (a)   kilometres

Animals become aware of differences in (a)   before humans do

Animals are also very sensitive to weather (a)  

In the past, most humans could read weather (a)   better than they can now

(a)   animals are particularly sensitive to changes in the weather

Bad weather could be on its way if certain birds are flying (a)   than usual

A rise in earth's temperature has caused birds to migrate (a)   than before

Environmental problems are changing the delicate (a)   that affects animals