The extinction of biological clusters refers to the abrupt death of a large number of organisms in a relatively short geological period and in more than one geographic area, resulting in a sudden and significant decline in the number of biological species in a short time. According to the above definitions, Which of the following are extinct of biological clusters:. ['On June 6, 1987, after the death of the last black puffin, this South American-specific finch songbird disappeared forever on earth.', 'Over the past 40 years, the number of native bird species in the UK has decreased by 54%, the number of native wild plants has decreased by 28%, and the number of native butterfly species has decreased by a staggering 71%.', 'Studies have shown that more than 70% of the 163 tree species in the savannah region of central and western Brazil will become extinct.', 'About 250 million years ago, at the end of the Permian, 96% of the species on the planet became extinct, of which 90% of marine life and 70% of terrestrial vertebrates became extinct.']