The characteristic of all living things among the options you provided is B: maintaining homeostasis. Homeostasis refers to the ability of an organism to maintain a stable internal environment despite changes in external conditions. This is a fundamental characteristic of all living organisms.
The other options are not characteristics shared by all living things:
- A: "moving from place to place" - not all living things move; for example, plants are stationary.
- C: "sending cells to deliver messages in the body" - this is specific to more complex organisms, particularly animals.
- D: "using nerve cells to maintain temperature" - this applies primarily to animals with a nervous system, not to all living organisms.
Thus, the correct answer is B.