Answer:
3. a big root system in desert plants
Explanation:
You can work this out by process of elimination
1. is bad, the green colouring against grey rocks makes lizards easier to be seen by predators, reducing their chances of survival
2. is also bad, a thick coat of fur can cause overheating during the day in the desert
4. thin leaves that are delicate will not be able to withstand cold temperatures, also a small surface area will not provide good conditions for photosynthesis
therefore 3. is the best adaption. a big root system allows a higher surface area and larger 'covered' area for plant roots to absorb more water, increasing their survival chances.
