One advantage of Li-Fi over Wi-Fi is:

a) Longer range
b) Higher security
c) Lower cost
d) Greater compatibility

Radio waves can pass through walls, so people outside your WiFi network can intercept them. The opposite happens with LiFi. Light bounces off the walls and surfaces. Data transmitted through LiFi is secured in an enclosed space. You can then use WiFi in common areas and designate LiFi networks in spaces where vulnerable devices are connected.