Yes, it is okay. you should never change your hypothesis if it was wrong.
the brain has to grow it happens because of the nervous system
1.The heart is Beating 2. It is kicking
A baby is safe in the womb because it is well insulated and designed as the perfect baby carrier
D) A & B
it protects the seed against any damage or harmful weather conditions and also helps in dispersal of the seed through different means.