All are ways to better protect the marine
environment and organisms except:

reducing and recycling.
disposing of all waste in a landfill.
not releasing helium balloons.
reducing the use of pesticides.

Question

All are ways to better protect the marine 
environment and organisms except:

reducing and recycling.
disposing of all waste in a landfill.
not releasing helium balloons.
reducing the use of pesticides.

anonymous · Answer

The third one. It virtually does nothing to the marine environment whether you release helium balloons or not. 

Pesticides and disposing of all waste in a landfill are all the major contributors to preserving marine life because they can get into the water and cause all sorts of trouble.

Reducing and recycling is more of preserving the general life on Earth, not just the marine life.

anonymous · Answer

The answer is disposing of all waste in a landfill because some of the waste should be recycled. Reducing and recycling helps out the whole world, not releasing helium balloons prevents marine animals from getting them stuck in their stomachs, and pesticides are extremely harmful to animals.