4. (1) most birds are born in either of two very different states. (2) some are born weak, blind, and usually naked. (3) about all they can do for themselves is open their mouths for food. (4) other newborn baby birds are bright-eyed and covered with down. (5) as soon as their down is dry, they are able to peck at things and run after their parents.
click on the appropriate transition to fill in the blank.
a. rather than

b. in contrast

c. likewise

d. similarly