The end of the Triassic period was possibly caused by the large (a) rift zone that developed due to Pangaea breaking up.
The correct option is C.
In a newly emerged ecosystem, the stages of the ecosystem development is often divided into three basic stages, which are pioneer, intermediate and climax stage. The intermediate stage of the ecosystem development is also called seral stage and the seral community refers to the community of plants that occupy the ecosystem during the intermediate stage. From the information given in the question above, it can be seen that annual weeds and shrubs occupied the ecosystem during the intermediate stage.
C is most likely your answer (my bad if I am wrong)
sensation
Sensation can be defined as
the activation of sensory receptor cells by the stimulus. However, the
processing of the sensory stimuli into a meaningful pattern can refer to as
perception. Thus, not all sensation is usually perceived but perception is
dependent on sensation.