Shanita draws a picture on a piece of paper and then folds it into a paper airplane. she throws it at her little brother, and it hits him in the head. he responds by ripping up the paper. which of the following is an example of a physical change? a. drawing on the paper b. folding the paper into an airplane c. ripping up the paper d. all of these

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: