He went to Africa in search of gold.

There is a rare penguin in this zoo.

By valuing the daily routine of waking up and going to sleep, you can lead a healthy life.

Every day, he repeats the cycle of waking up and going to bed.

His actions show true mettle.

His mettle shows that he never gets discouraged even in difficult situations.

He expressed his opinion without any constraint.

He expressed his opinion without hesitation.

He cooked using a gas stove.

He exercises every day and leads a healthy life.