What was significant to darwin about the fauna and flora of the galapagos islands?

There are more than 500 plant species found on the Galapagos, about one-third of which are endemic.

Explanation:

Endemic meaning that these plant species are native to the islands and found nowhere else in the world. There are also exclusive species of cotton, guava, passion flower, pepper and tomatoes that all grow there.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.