1pt Which is an observation? O A. A person hears the song of a bird. OB. A person suggests that bird calls are a means of communication. O C. A person concludes that bird calls attract mates. OD. A person writes a paper describing different kinds of bird calls.

hujjujddf

an energy transformation flow diagram is shown

where is it ?

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.