Which of the following is the longest distance from earth? a. the distance to the edge of our solar system b. the distance to the next galaxy c. the distance to the nearest star beyond the sun d. the distance to the edge of the universe

i'd say that the moon rock is about 2.2 billion years old.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.