Which plate boundaries and movements most commonly create earthquakes? explain how earthquakes can be created by plate tectonics.

Movement of convergent boundary, divergent boundary and transforming boundary causes earth quake.

Explanation:

As per the tectonic plate theory, there are three different plate boundaries namely – convergent boundary, divergent boundary and transforming boundary. When these tectonic boundaries relatively move against each other, then earth quake occurs.  

The tectonic plates are nothing but just large pieces of earth that move and crush into each other.  

These tectonic plates lie on the mantle of earth which acts as a fluid thereby enabling these tectonic plates to float. Convection current with in the mantle causes floating.  

Now the earthquake is caused at the plate boundaries –

Case I - When the two plates move towards each other, they collide and one plate slips below the other.

Case II - When the two plates move away from each other, volcanic activities accompanied by earth quake occurs here.  

answer;

a. sheep consumption efficiency would be reduced.

explanation;

-trophic efficiency is a measure of how much energy occurs at one level divided by the energy at the level immediately below it . trophic efficiency incorporates three types of efficiency:

-the proportion of available energy that is consumed (consumption efficiency).   it is the proportion of the available biomass that is ingested by consumers.

-the proportion of ingested food that is assimilated (assimilation efficiency).

-the proportion of assimilated food that goes into new consumer biomass (production efficiency).

-in this case, the grasshoppers would affect sheep by reducing the proportion of the available biomass that is ingested by the sheep.