I think the answer is A: defining the problem and proposing a solution.
True I'm not 100% sure I'm right but I pick true
I don’t think you’re looking for a part but I believe you’re looking for blood, more specifically the red blood cells
The tadpoles take their food from the yolk of an egg. The egg yolk is equivalent to the placenta. T<span>he </span>placenta <span>attaches itself to the uterus to provide the </span>developing<span> foetus with blood and oxygen.</span>