the health of a body of water means the water quality of a body of water & the temperature / ph of a body of water has an impact on the health of a body of water ->  ph of a body of water has an impact on the water quality of a body of water  ph of a body of water has an impact on the water quality of a body of water & acid rain changes the ph of water ->  acid rain has an impact on the quality of a body of water by changing the ph of the water  acid rain has an impact on the quality of a body of water by changing the ph of the water & acid rain has a negative impact on water quality ->  acid rain has a negative impact on water quality by changing the ph of water  a tadpole is a kind of animal & a tadpole lives in water ->  tadpoles are animals live in water  tadpoles are animals live in water & changing the ph of water can cause animals live in the water not be able to survive ->  changing the ph of water can cause tadpoles not be able to survive  acid rain has a negative impact on water quality by changing the ph of water & changing the ph of water can cause tadpoles not be able to survive ->  acid rain has a negative impact on a tadpole's ability to survive by chaning the ph of water  animal is a kind of organism & a tadpole is a kind of animal ->  a tadpole is a kind of organism  acid rain has a negative impact on a tadpole's ability to survive by chaning the ph of water & a tadpole is a kind of organism & if something has a negative impact on the survival of an organism then that organism may be unable to survive -> if acid rain changes the ph of water then tadpoles may by unable to survive