Which part of map explains the symbols, colors, and lines? a. key b. scale bar c. compass rose d. inset

The key tells you what everything is. Also commonly known as a 'legend'.

The key would be your best bet at the answer or A.

As the Key is the part of maps that explain what lines, colors, or other indicators mean. It gives a quick couple of words on what it is to represent; a secondary word for it would be "legend."

Example

Solid Line ( In a Key) May mean the border between two states or countries.

idk

explanation:

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.