The given circuit symbol needs to be identified from the provided options. Let's analyze each option to determine which one the symbol represents:

1. Variable resistance or rheostat: The given symbol represents a component with a zigzag line crossed by a diagonal arrow. This is the standard symbol for a variable resistor or a rheostat, which allows the resistance to be adjusted.
2. A wire: A wire is usually represented by a straight line. The given symbol is more complex, with an arrow indicating variability, which does not match a simple wire.
3. A battery: A battery is typically illustrated with a series of long and short parallel lines. This is clearly different from the given symbol.
4. Switch in the closed position: A closed switch is generally represented by a line connecting two terminal points. The symbol here does not fit this description either.

Based on the analysis above, the correct answer is Variable resistance or rheostat. The arrow indicates the ability to adjust the resistance, which is characteristic of a rheostat.