I am pretty sure your answer would be D.decomposer :)
D) The island will suffer a loss of native plant and animal species. Due to loss of plants the animals living in a particular area might not be able to find food to survive causing them to die eventually because of starvation
They are not from the periodic elements scientifically.
Im pretty sure that the answer is C but just review anyway
Water is compound h2o. awnser A