What type of isolation was occurring in the collared lizard population?

Dispersal

Explanation:

It should be understood that there was a point in time when the collard lizards were going into extinction. This is due to some certain human activities such as bush burning, which caused the death of this particular creature and others.

Therefore, this activity led to the dispersal of the remaining member of the population, which resulted to being isolated on a mountain.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.