Answer:I will be pilot anyways I know one there is a commensalism between a dolphin and the birds where the birds push the fish to the top of the water column and then the birds push the fish down to the dolphins I will be pilot
Explanation:
The property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard is : Hardness and Brittleness
Those properties make chalk leaves residues on the board every time friction happen between the chalk and the board
hope this helps<span />
Answer:
I think A or B could be a possibility to your answer