Which statement is correct about how muscles move bones?
a. tendons connect extensors and flexors to each other
b. extensors cause a bone to move initially
c. the insertion is where a muscle attaches to the bone it wants to move
d. the origin is where only flexors attach to move a nearby bone

the correct answer is C "the insertion is where a muscle attaches to the bone it wants to move

Explanation: I took the quiz also remember a muscle is always needed to move a bone  

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.