Which is a soft flexiable supportive tissue that is replaced by the bone during ossification? marrow? sprongy bone? cartilage outer ? membrane?

The correct answer is cartilage.
Cartilage is a type of a flexible tissue in human and animal bodies whose function is to support. During ossification, which is a process of bone tissue formation, it is replaced by an actual bone, which is a much sturdier and tougher, inflexible version of the cartilage. 

Answer///blank (1) dea; ///drug enforcement agency;                                 blank(2) fda; // food and drug administration;