In a plan to stop the erosion of East Coast beaches, the Army Corps of Engineers proposed building parallel to shore a breakwater of rocks that would rise six feet above the waterline and act as a buffer, so that it absorbs the energy of crashing waves and protecting the beaches.
act as a buffer, so that it absorbs
act like a buffer so as to absorb
act as a buffer, absorbing
acting as a buffer, absorbing
acting like a buffer, absorb