Not sure if these are right, can anyone help?

How is the introduction of the cane toad to queensland, australia an example of the unintended consequences of using non-native species to control pests? (site 1)

If the human population continues to grow, what is a likely effect on land use? a. more land will be used for cities. b. more land will be used for forests. c. more land will be used for grasslands. d. more land will be used for wetlands.

When her rct is completed, julissa will see a/an to get a bridge made to close the space. a. prosthodontist b. endodontist c. orthodontist d. oral surgeon