Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Oceanic Trenches are formed due to of tectonic boundaries.

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Ocean trenches are a feature of convergent plate boundariess. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench