Answer:
The 3rd Option
Explanation:
Simple for this question, C: an investigation because it uses only observations.
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>
Talking to a doctor to get prescribed medication and or talk to a therapist.
If organ systems failed to work together your body would not work because your heart pumps blood in order for your whole body to work.
