12-O (Word Formation)

instinctive

Female animals have an ______ need to protect their young. (INSTINCT)

eruption

Following the ______ of the volcano, hundreds of villages were destroyed. (ERUPT)

casual

I'm not convinced that there's a ______ link between pollution and global warming. (CAUSE)

erosion

The ______ of the cliffs by the sea has completely changed the landscape. (ERODE)

occurrence

The chances against this kind of unusual ______ are very high. (OCCUR)

elusive

The expedition travelled miles in search of the ______ mountain gorilla. (ELUDE)

mysterious

The police are investigatin the ______ disappearance from the zoo of a number of animals. (MYSTERY)

favourable

We have to wait for ______ conditions to launch the boat. (FAVOUR)

risky

We knew that getting between the whale and the ship was ______, but it was the only way to stop them hunting. (RISK)

assessment

What's your ______ of the situation? (ASSESS)