The species of finches that Darwin found on the Galapagos Islands displayed different structural and behavioral adaptations. These adaptations differed among the species according to the birds' varying habitats. Such adaptations most likely evolved as a result of

A) use and disuse

B) transmission of acquired characteristics

C) reproductive isolation

D) geographic isolation

Your answer should be "that withstands winter winds". Adjective clauses can always be removed from a sentence, and leave a complete sentence behind. They also usually follow the noun they modify. In this case, the clause is modifying tree. Adjective clauses also usually start with certain words, and "that" is one of the starter words. I hope this helps!