The actual answer is, "A", an ocean trench.
You can find out more about them by researching them up on Google, it's only a few phrases and a hit on the enter key :P
Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Organism
Answer:
takes in carbon dioxide, puts out oxygen
Explanation:
<span>Since the child has never been away from his parents and siblings and also he is only 4 years old it is better to have one of them stay with the child. The presence of a family member will reinforce trust and provide support to the kid.</span>
