Answer: The whole body (the church) grows as God causes
it to grow, (verse 19).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
Ephesians 4:14-16: "Then we will no
longer be infants, tossed back and forth by the waves, and blown
here and there by every wind of teaching and by the cunning and
craftiness of men in their deceitful scheming. Instead,
speaking the Truth in love, we will in all things grow up into Him
Who is the Head, that is, Christ. From Him the whole body,
joined and held together by every supporting ligament, grows and
builds itself up in love, as each part does its
work."