This is the 11779th most frequent Russian word.
заключают
"Заключают" means "conclude" or "enter into" (e.g., an agreement).
In this sentence, 'заключают' is used to indicate the action of formalizing or signing an agreement.
Договор заключают два партнера.
The agreement is signed by two partners.
Here, 'заключают' illustrates the act of deducing or concluding based on evidence.
Учёные заключают, что данные указывают на изменение климата.
Scientists conclude that the data indicates climate change.
In this example, 'заключают' is used to express forming an opinion or judgment.