1. They might be using the wrong kind of soil for the plants, causing them to die.
2. The new neighbors could be adding something toxic to Bill's grandparents' plants.
3. Maybe what the neighbors are adding to their garden is affecting Bill's grandparents' garden on the other side of the fence.
The axial skeleton is composed of the skull and vertebral column/ribs. It is important because all other bones attach to it.
The passing on of physical or mental characteristics genetically from one generation to another.
Answer:
1) Escalating poaching, or illegal killing, for the commercial trade in ivory and meat.
2) Growing demands of exploding human populations and poverty.
One live was as a tadpole and the other is as a frog.
Hope this helps. :)