Which of these is closest in meaning to the word 'hatched' in line 1?

Directions: Read the passage and answer the question that follows.

1. Dinosaurs hatched eggs and the young ones had legs and lungs.
2. The first dinosaurs to develop resembled their reptile ancestors.
3. They were slender and probably no bigger than a turkey.
4. And, like a turkey, they walked on their hind legs.
5. They lived in low, swampy places.
6. Then an enormous and very heavy asteroid hit the earth and blasted a thick layer of dust to block out sunlight for as long as five years.
7. The plants died and the dinosaurs were deprived of food.
8. Eventually they starved to death.