Many vegetables species, through careful selection of varities,

can be grown in widely diverse environments.”(paragraph 3).

The underlined words means ….
various

Many vegetable species, through careful selection of varieties, can be grown in widely diverse environments. Growers must still be careful, however, to choose varieties, can be grown in widely diverse environments. Growers must still be careful, however, to choose varieties adapted to their particular soils and climates. Most of the common vegetable species used for crop farming were developed in temperate regions, but some have been adapted to the Tropics. Tropical vegetables include a variety of root crops (particularly yams and cassava); diverse melons, squashes, and beans; and many kinds of plants grown for their edible leaves and stems.

  X : Tom, are you sure that we are going to have a math test next Monday?