How do the muscles in the human body with movement? a. muscles contract and thus pull on bones to cause movement. b. they bend the bones. c. the bones are contracted by the muscles. d. they push the bones apart using ligaments.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.