Answer:
1. A spinal column is present
5. It's about to undergo a metamorphosis
Explanation:
It's:
#1 because, you can clearly see the spine in the image.
#5 because, metamorphosis is a very common process which marks the transition between embryonic and adult life stages.
It's Not:
#2 because the chick already developed limbs and an beak.
#3 because chickens are vertebrates (animals that lack an back bone are invertebrates).
#4 because it's a chick, chickens are considered mature when they start laying eggs.
