growth of shells
... that temperature and salinity variations produced by ocean tides and freshwater rivers in estuaries make them ideal habitats for studying how these factors affect the growth of shells?
... that temperature and <a href="./Salinity" id="mwCJs" rel="mw:WikiLink" title="Salinity">salinity</a> variations produced by ocean tides and freshwater rivers in <a class="mw-redirect" href="./Estuaries" id="mwCJw" rel="mw:WikiLink" title="Estuaries">estuaries</a> make them ideal <a href="./Habitat" id="mwCJ0" rel="mw:WikiLink" title="Habitat">habitats</a> for studying how these factors affect the <b id="mwCJ4"><a href="./Shell_growth_in_estuaries" id="mwCJ8" rel="mw:WikiLink" title="Shell growth in estuaries">growth of shells</a></b>?