4) all of the above.
This because it cause all of these things obviously
One parents would have a Homozygous trait BB for blue eyes in order for the blue eyes to be shown in an offspring.
One parents could have either heterozygous (Gb) or homozygous (GG) traits for the green eye trait to appear since it is a dominant trait.
The nervous system, i could be wrong.
Peregrine falcons have a wide diet, including many types of smaller birds. These birds eat bugs like grasshoppers. So, if the grasshopper population decreases, then the birds who are a food source to peregrine falcons will also have a lower population. This means that there is a lesser amount of food for the peregrine falcons to eat, so their population will decrease as well.
Good luck with your problems!
Jackals were one of the most breaded animal for fur coats in the 19th century