Answer:
Tissue
Explanation:
A tissue is defined as a group of cells that carry over to do a similar job, meaning they have similar structures (like for example adipose tissue, aka fat).
When the embryo (baby) died within the sac its forming inside. Due to this, the body reacting against it causing pain as such. On ultrasound you see an empty sac (sac with black center).
Superior and inferior
Superior (from Latin super, meaning 'above') describes what is above something and inferior (from Latin inferus, meaning 'below') describes what is below it. For example, in the anatomical position, the most superior part of the human body is the head and the most inferior is the feet.
It is C, you are extremely nervous and start sweating while waiting in line for your name to be called to accept your high school diploma.
