         Sentence. 1: Hy ae coastg speed  tough? da 2 +   Sentence 2: Coastat ‘Species heed to ‘be:  tough “enough: te. withstand Waves: and  swirling sediment: particles, while: ‘some  oceani¢é .speciésare’so’ fragile that, it is.    very ‘difficult ‘to. Saetuce, hem, intact for  study ;    