In the hierarchy of life, molecule, cell, and tissue appear below the organ level. They however do not follow each other in the arrangement. Only the population appears to be above the organ level but below the community. Therefore, the answer is population.
The answer would be A, B and C because d wouldnt be right because species ARE apart of the ecosystem and C is plainly wrong.
The answer is bonds between atoms break and new bonds form. In order for a chemical change to happen, a new substance/substances (products) have to form that have different properties from the reactants. The bonds in the reactants break and new bonds form in the products.
Hope this helps
Dying stars can explode.
A dying star can become a black hole.
A dying star can expand and get bigger right before they die.