Select the phrase(s) from the given three options which

Solution

The sentences share a cause-effect relationship - A tells us that many insect groups have adapted to every terrestrial environment, and B gives the effect of this - they survive extinctions and then diversify by adapting to new situations. 1 is correct as BECAUSE is used to show causation - “Because many insect groups have adapted to virtually every terrestrial environment, they survive extinctions and then diversify by quickly adapting to new situations and opportunities that appear after biodiversity crises.” 2 is correct as THEREFORE is used to show causation - “Many insect groups have adapted to virtually every terrestrial environment, therefore, they survive extinctions and then diversify by quickly adapting to new situations and opportunities that appear after biodiversity crises.” 3 is correct as SO is used to show causation - “Many insect groups have adapted to virtually every terrestrial environment, so they survive extinctions and then diversify by quickly adapting to new situations and opportunities that appear after biodiversity crises.”