Here you have two characteristics to cross on Punnet square: Blood type and pigment.
They told you both parents are AB this means co-dominance of A and B, you draw the Punnett square (photo), and you'll see your offspring possibilities are 50% AB type, 25% A type, and 25% B type.
Now they told you both parents are homozygous for pigments this means Aa. When you draw the Punnett square (photo), you'll see your offspring possibilities are 50% Aa, 25% AA, and 25% aa.
75% pigmented and 25% albino.
The answer should be letter B I'm sorry if not
Answer: Muscular system because it is a complex body system, the others are organs in cells
The answer is: A nerve block
A nerve block is a procedure of regional anesthesia, surgical or medical injections of substances, aimed at removing pain for a period of time, up to the final eradication of this pain, for therapeutic or diagnostic purposes.This procedure involves the local injection of anesthetic instead of pain. The anesthetic is usually directed to the nerve that serves the pain area.