Answer:

1. Navigation: Tides affect the depth of water in harbors, ports, and shipping channels, making them important for safe navigation.

2. Ecosystems: Tides provide nutrients and oxygen to coastal ecosystems, which support a variety of marine life.

3. Energy: Tides can be harnessed for renewable energy through tidal power generation.

4. Recreation: Tides create opportunities for activities such as surfing, fishing, and beach combing.

5. Climate: Tides play a role in regulating global climate by affecting ocean currents and circulation.