The correct option is A, FEEDING HABIT AND MIGRATION. From the passage given above, it can be seen that seagulls are scavengers, they usually eat from garbage dumps while wild geese eat seeds and insects, thus they differ in feeding habit. In term of migration, seagulls does not follow seasonal pattern of annual migration while wild geese do. These are the contrasts between the two birds.
The lake on titan was evaporated, it evaporated because at that time titan was going through summer.
All DNA is a cell is harbored in the nucleus, so DNA replication should only occur in the nucleus of the cell.
