In the following passage, there are blanks, each of which has been numbered. These numbers are printed below the passage and against each, five words are suggested, one of which fits the blank appropriately. Find out the appropriate word in each case.

The (1) of Bengal tigers left in the world has (2) from 100,000 to 4,000 over the last century. The main threats are (3) of habitat, poaching and the trade in tiger parts for Eastern medicines. Most Bengal tigers live in protected areas of India. Antipoaching task forces have been (4) up and there is also a trade (5) on tiger products in many countries, as a measure to save this rare species.