He is a very active person.

He showed his gratitude on his face.

He has difficulty expressing his emotions in words.

He said it's important to maintain the balance of yin-yang.

We participated in the local cleaning activity over the weekend.

We are actively participating in local activities.

He is good at explaining that theory.

We are using LED bulbs for energy saving.

We should use more renewable energy.

When the sun rises, a new day begins.