For organisms to be classified as the same species, they must be able to breed with each other and produce offspring.

Fertile

Explanation:

Organism belonging to different species can mate but the offspring produced will not have re productivity or fertility.

For example -

When a healthy horse and a healthy donkey mate, they produce mule. Mule is also a healthy species but is a hybrid species of the two and thus infertile.

Therefore, two organisms that belong to the same species must mate together in order to produce offspring with high re-productivity, fertility and viability.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.