How are Deserts Formed? 
Improper Irrigation can lead to Desertification
Overgrazing
Deforestation
Urbanisation and Over Population
Activity A
Adaptations of Animal in Desert Conditions : 
Big ears to loose heat
Padded feet protect themselves from desert heat.
Fennec Fox
Activity B
Scarce vegetation
Climatic changes
Lack of water/rainfall
Very less rainfall
Making crop fields
Quarrying
sleeps in the morning/wakes up at night
Run really fast
Live in burrows
Fur helps in camouflaging
Hunt at night
Night vision enables them to hunt at night