How does this sequence of numbers progress?

He is an ardent music lover.

I'm always moved by his passionate expressions of love.

This company was divided into two.

His speech left a powerful impression.

I was surprised by the intensity of his speech.

This book is part of the Harry Potter series.

This electrical circuit is connected in series.

Please look at the column of this table.

I think she is truly a faithful woman with a strong will, always sticking to her beliefs.