Based on the text below, answer questions 28 and 29.(( The turning tide for the turtles With their exquisite shells, their smiling faces, their deliberate movements, and their amazing sea–born agility, sea turtles have always captured human imagination. Once severely endangered, turtle populations are growing steadily thanks to conservation projects worldwide. And with more than 8000 km of coastline, large stretches of which are favorite nesting spots for turtles, Brazil is one of the leaders in the race to protect them. (Adapted from http//www.speakup.com.br) The relative pronoun "which" in " (...) large stretches of which are favorite nesting spots for turtles." refers to: