I believe the answer is the first one. Hope this helps.
Correct me if I'm wrong though.
A. The starch is a substrate. Substrates and enzymes fit together like a lock and key. The enzyme is the circle in the image. The substrate connects to the enzyme in a location, called the active cite.
The answer to your question is,
D) Oppositely charged.
-Mabel <3
A new born has soft spot on he top of its head. This is called as fontanelle and is diamond in shape present on the top of the head of the baby.
Babies skull is very soft and can be very easily moulded, to help them squeeze through the birth canal at the time of delivery.
Moulding is done in the skull of the babies as it is most largest part of the body during the time of delivery.
As soon as the skull and bones of the baby meet and fuse they become hard gradually.
