Answer:
Before art class, we have Spanish III.
Explanation:
the comma should separate a dependent sentence from an independent sentence.
'before art class' is the dependent sentence as it is incomplete without another sentence or words.
'we have Spanish' is the independent sentence as it starts with the word 'we' and it is used to complete a dependent sentence.
The last one is not true. Only the second statement mentions how fragile the environment is that coral reefs exist in.The first statement focuses on erosion and pollution as causing the reefs to die.
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