Which state of matter consists of ionized particles? solid liquid gas plasma

The correct answer is option D, Plasma

Plasma is the condition where a hot gas is ionized. It consists of equal numbers of positive and negative ions. It is an electrically conducting environment which is considered as the fourth state of matter. Plasma gases are affected by electric and magnetic waves as compared to the neutral gases (which remain unaffected by electric and magnetic wave) due to the presence of negative and positive ions.  

sex cells are usually half's then they find another half and make a fertilize egg