Answer to Question 1
GFCI stands for ground fault circuit interrupter, which disconnects the electricity to a
lamp when it detects a short circuit.
Answer to Question 2
Chain-link fences provide little privacy and are not very pretty, but they are
commonly used because they provide security and are fairly inexpensive.
Rail-type fences give no security or privacy but are used to show where the property
line is located or for decorative purposes.
Basket weave or board-on-board fences provide privacy and security, but they are
expensive.