Some animals use diffusion instead of a circulatory system. examples include:
birds and jellyfish
flatworms and arthropods
mollusks and jellyfish
none of the above

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.

This movement is also referred to as  glacial plucking

You should provide a picture to show where the arrow is pointing and which information that is given. but there are 3 branches of the government, legislative, executive, and judicial. legislative makes laws, executives pass laws, and judicial are the courts