Abiome is identified by its particular set of abiotic factors and its
a. average precipitation and temperature.
b. characteristic ecological community.
c. distance from the equator.
d. specific geographical location.

The answer is B. Characteristic Ecological community

Biome is a formation of living organisms that have common characteristics due to similar climates.

Desert is one of example of biome.

Beside desert's abiotic factors ( such as really high temperature, large amount of sands), it's also identified by its characteristic ecological community ( all of them have the capability to survive with minimum water intake)

Magma is outside the volcano  and lava is inside the volcano. 

1. antarctica2. saudi arabia