In the next paragraph, the logical relationship between sentences is not clear. Add a transition word at the beginning of sentences 2, 3, and 6 to make the relationships between sentences clear.
1 Coral rely on two main energy sources. 2 _____they capture planktonic organisms with their tentacles. 3 _____ they rely on nutrients provided by photosynthetic zooxanthellae, single cell algae that live symbiotically within the coral tissues. 4 Coral bleaching occurs when coral lose their zooxanthellae endosymbionts or zooxanthellae lose their photosynthetic pigments (Glynn, 1996), or both, due to changes in water level, water temperature, UV radiation, sedimentation, pathogens, pollution, and nutrient abundance. 5 Bleaching is reversible if stressors are temporary and not too severe. 6 _____, continuous stress and zooxanthellae depletion leads to coral death.
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