A.retaining
B.stopping
C.pausing
D.ending

A.scarce
B.available
C.decreasing
D.plentiful

A.remaining stable
B.going up
C.decreasing
D.developing

A.improvising
B.enhancing
C.implementing
D.enacting

A.implementation
B.enlightenment
C.encouragement
D.endorsement

A.harsh
B.separate
C.safe
D.serious

A.frighten
B.worry
C.dare
D.fear

A.frighten
B.worry
C.dare
D.fear

A.there are about five hundred types of plants
B.seventy species of mammals can be found there
C.it is home to about ninety species of birds
D.fewer than 100 reptiles are found there

A.confirm
B.calculate
C.formulate
D.participate