The phrase "attachment grows" is correct and usable in written English.
It can be used to describe the increasing emotional or psychological connection between individuals or entities over time.
Example: "As they spent more time together, the attachment grows stronger, leading to a deeper bond."
Alternatives: "connection deepens" or "bond strengthens".
As our alien's emotional attachment grows, so too do his reflections on the odd appeal of our short and brutish lives, and especially on our gift for love.
James teases the reader, who swings between skepticism and hope, between, one might say, Dr. Sloper and Mrs. Penniman, as Catherine's attachment grows.
The area between the mouth and the point of attachment grows rapidly until the mouth comes to be directed away from the point of attachment, which now becomes the posterior end of the animal.
The child with secure attachment grows up to be secure, self-reliant, and co-operative.
The more we live in the outer pleasures, the more our attachment grows.
In the spring of the following year George Washington, then a young plantation owner and commander of the Virginia forces in the French and Indian War, began to court her, and their attachment grew increasingly deep.
Children who form a secure attachment grow up better able to maintain their unique sense of identity, while still being able to connect with others.
As I came closer to the more intense moments nearing the end of the game, that attachment grew and started to influence the way I would act in real life.
In contrast to other solid tumors, most SCLC cell lines do not require attachment, grow as clusters in suspension and are highly tumourigenic.
Therefore, the more loving the attachment growing up, the more loving their attachment usually is in marriage.
As Blaffer Hrdy wrote: "Infants with several attachment figures grow up better able to integrate multiple mental perspectives".
