Which plate boundary is responsible for the formation of ocean trenches, mountains and volcanoes?
a) a
b) b
c) c
d) all of the above

D.All the above

Explanation:

There are three main types of plate boundaries:

1. Convergent boundaries: where two plates are colliding.

2. Divergent boundaries – where two plates are moving apart.

3. Transform boundaries – where plates slide passed each other.

Convergent boundaries: when one or both the tectonic plates collide with each other then subduction zone occurs. These plates are composed of oceanic crust.

When both of the plates are made of oceanic crust ,island arc and  oceanic trenches occurs. Spreading of seafloor  also occur at the back of island arc known as back-arc basins it also associated with the eruption of submarine volcanoes.  

When two continental crust collide with each other due to their lightness it creates the formation of large mountain ranges.  example Himalayas

good thing- during decomposition the organic molecules in organic matter are broken down into simpler organic molecules that require further decomposition or into mineralised nutrients

bad thing- it can be harmful in crop productivity

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.