In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.

Every living species of our planet has changed or is changing. Some (1)______, such as the pre-historic sabre-toothed tiger (2)______ died out and some are (3)______ dying out. Sometimes new species appear. The dog is (4)______ species which man has caused to (5)______ from the wolf.