Which of the following attributes is characteristic of savannas but not of grasslands?
a.
burrowing animals
b.
droughts and fires
c.
shrubs and isolated trees
d.
a large number of grazing animals

c.  shrubs and isolated trees

Explanation:

Savanna refers to the tropical grassland and is characterized by presence of scattered trees and shrubs. It is located in areas of low rainfall or seasonal rainfall and experiences prolonged dry periods. The tree species present in Savanna exhibit fire adapted features and adaptations for protection against herbivores. As compared to the Savanna, the grasslands do not have trees.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms