Fill blank (iv).

Directions: Read the following passage having some numbered blanks.

The maternal bond is typically the relationship _____(i)_____ a mother and her child. While it typically occurs _____(ii)_____ pregnancy and childbirth, the maternal bond may also occur between a woman and an unrelated child, such as in adoption. There are hundreds of factors, physical and emotional, _____(iii)_____ influence the mother-infant bonding process. Lots of new mothers do not always experience the "instantly-in-mother-love" emotions. Bonding is a gradually unfolding experience that can take hours, days, weeks or months to evolve. Many believe that early bonding ideally increases response and sensitivity _____(iv)_____ the child's needs, bolstering the quality of the mother-baby relationship.