Answer:
The correct option is A. A directory of relatives' phone numbers
Explanation:
Family communication plan is a measure taken to contact the relatives of a person if an emergency situation arises for a person. In today's modern world, emergencies can happen at any time so it is very important to have a family communication plan so that the relatives of a person be informed immediately. Hence, option A is correct.
Other options are false because none of the other options will be usable in case of an emergency.
Sources of heat from inside earth is radioactive decay and residual heat.
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It would take forever listing all the animals that have adaptations that helps them survive in their environment.
Natural selection is the process by which individuals with characteristics that are advantageous for reproduction in a specific environment leave more offspring in the next generation, thereby increasing the proportion of their genes in the population gene pool over time.
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All accept for “in some cultures there’s an increased risk for certain diseases” and “the populations live at extreme altitudes” because both of these statements do not relate to cultural values