A looks like it’s pointing towards the nucleus, but since that’s not an option, we can assume it’s pointing at what’s surrounding the nucleus, which is the cell body.
C is an axon.
D is an axon terminal, so named because when neurons form a chain, they attach at their ends, so “terminal” makes sense.
Phosphorus, soil, water and oxygen are renewable resources that can be found freely on earth.
Renewable resources are natural resources that can easily be replenished as they are used either by natural means or through cyclic processes in our human life time.
Phosphorus, soil, water and oxygen are easily replenished by natural processes and through the biogeochemical cycle of materials.
Fossil fuels, trees are not renewable as they can easily be depleted.
Non-renewable resources must be used sustainably to ensure their all round availability.