Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Ladybugs have ____ legs and keep their wings tucked away until they are ready to fly.\Question: Choose the right answer from options given a) six b) eight c) one d) zero
a

Mosquitoes have ____ distinctive life stages, with the first three stages being spent in the water.\Question: Choose the right answer from options given a) four b) zero c) nine d) five
a

Cells become specialized, forming the ____ germ layers found in all vertebrates.\Question: Choose the right answer from options given a) three b) seven c) ten d) no

a