Which events are examples of cyclical change? select two correct answers.. a. seasonal changes b. the annual melting of snow c. the introduction of a new species d. an average rainfall e. unexpected tsunamis

The answers are; A & B

Intuitively as it sounds, cyclic change is the change that recurs over a particular period of time. Seasons recur every year in specific regions on earth. In addition, receeding and expanding of ice caps also occur  based on seasons. These two are examples of cyclic changes.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation