I'm pretty sure that you are talking about mass.
B because the genotypes of the parents would be Pp because they are heterozygous. The genotypes they could inherit are PP, Pp, Pp or pp.
Answer:
<em>The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in the Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.</em>
