Question

q: choose the word that fits best
a. required
b. capable
c. natural
d. similar
e. im not sure

Explanation:

The words in the diagram (needed, needful, requisite, necessary, compulsory, mandatory, obligatory) all share the core meaning of something that is required, mandatory, or essential. Among the options, "required" is the closest synonym that aligns with this shared meaning.

Answer:

a. required