Answer:the last one
Explanation: red blood cells are round in order to move easily through blood vessels.
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Or is this telling people who need this answered it.
Answer:
1. They have to be able to reproduce, either asexually or sexually.
2. They have to be able to respond to stimuli.
3. They have to have cells, either as a unicellular organism or as a multicellular organism.
4. They have to grow and develop.
5. They have to have homeostasis. This means that they can maintain their own body temperature. Think of this as a thermometer for the body.
6. The last thing is that all living things also have to be able to do is move.
Explanation:
