Theory:

Meanings of difficult words from the prose "Desert Animals":
  
Numbers
Words
Meanings
1.
ScorchingVery hot
2.
GerbilsMouse-like desert rodents with long hind legs
3.
BurrowA hole or tunnel dug by a small animal
4.
PebblyStony
5.
BeetleAn insect
6.
FrighteningAfraid
7.
HarmlessNot able or likely to cause harm
8.
PoisonA substance that is capable of causing the illness or death of a living organism
9.
VolesSmall plant-eating rodents
10.
ChipmunksSmall ground squirrels having light and dark stripes
11.
CoilTo turn, to make a loop
12.
ThreatenedTo be something that is likely to cause harm to someone or something
13.
VenomPoisonous toxin
14.
PredatorAn animal naturally preying on others
15.
AmusingInteresting; Enjoyable
16.
ForageAn action of searching for food
17.
ClawsNails present in paws of animals used for defence
18.
PawsAn animal's foot having claws and pads
19.
TwitteringIt is a call or a tweet sound (of a bird) and it gives a call consisting of repeated light trembling sounds
20.
SuspiciousDoubtful
21.
BushesA shrub or clump of shrubs with stems
22.
DangerThe possibility of something unwelcome
23.
HuntPursue and kill (a wild animal) for sport or food
24.
FamousWell known
25.
DodgeMove quickly to avoid its enemy
26.
StrikesAttack
27.
Nuisance Annoyance
28.
TiredExhausted
29.
MoundHeap
30.
Hollow logA log of wood with open space inside
31.
Termite moundConical mound of soil
32.
KittenA young mammal (any immature mammal)
33.
GuardWatch over in order to protect
34.
DomesticatedTo tame to keep at home or any other place
35.
ShaggyCovered with long, untidy hair
36.
TidierOrderly and clean in appearance
37.
Gallons
A unit of liquid equal to 4.55 litres
38.
MoistureWater or other liquid diffused in a small quantity as vapour
39.
ScarceRare/ Harder to find
40.
PierceAn action where a sharp, pointed object tears through any other object
41.
HumpA rounded protuberance found on the back of a camel
42.
Nourishes 
Provide with the food or other substances necessary for growth, health, and good condition
43.
ThornA stiff, sharp-pointed
44.
ShrinkBecome smaller in size
45.
RattleMove or travel with a sharp knocking sound
46.
DunesA mounds or ridges of sand
47.
DiveSudden jump
48.
UprightAny object point straight towards the sky