Final answer:
The word 'pend' is a root related to the concept of hanging rather than the options of to weigh or to pay, commonly found in words like 'pendant' and in architectural terms like 'pendentive'. The correct options are 1,2,3.
Step-by-step explanation:
The word 'pend' does not directly correspond to any of the choices provided (to hang, to weigh, to pay). However, 'pend' is a root in English that is related to hanging. It comes from the Latin verb 'pendēre', which means 'to hang'.
This root is present in English words like 'pendant' (a piece of jewelry that hangs from a chain) and 'pendulous' (hanging down loosely).
When it comes to architectural terminology, 'pendentive' is a structural feature that employs this root word, which describes a curved triangular surface that facilitates the transition between a circular dome and a straight supporting pier. The correct options are 1,2,3.