I think answer is B. Sorry if it is wrong.
I think it is 3 i'm not sure but i'm about 70% sure
Well if i am reading the question right then particles of matter are either ions, protons, neutrons or electrons is this have to do with chem or physics bc the question is a little vague
)Sexual reproduction maintains a constant level of variation in the population and requires less energy.
Cell Membrane because it transport nutrients into the cells and also transport toxic substances out of the cell .
