The answer to your question is A
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>
Answer:
thank you for the reminder!
Those diseases which spread by the air , water or any other medium is known as communicable diseases.