Krakatoa was an indonesian island that was completely obliterated in 1886, when a massive volcano exploded on the island. underwater lava flows slowly rebuilt a new island, called anak krakatau, by 1927. on anak krakatau, the first organisms to arrive were small weeds. the weeds then gave way to coconut trees. land crabs, seagulls, and rats began to colonize the island. by the 1980's, coconut trees gave way to tropical eucalyptus trees inland. wild pigs and large lizards colonized the island. in the future, a mature rainforest will re-grow. the paragraph is a description ofa) speciation. b) niche formation. c) primary productivity. d) ecological succession. answer is

Option D- ecological succession is the correct answer.

Explanation:

Ecological succession can be defined as the process of change in the structure of species of an ecological community over time. Like there can be a mass extinction for hundreds of years before a new ecological succession or development.

The island of Krakatoa experienced a series of succession in order to restore the little life capable of living on the island. After the explosion, no plant or animal life on Krakatoa survived but slowly and gradually life again seeped through and today the island is a home to several species of vascular plants, butterflies, birds, reptiles etc.

It's D

Explanation: i just got it right on USAtestprep

the sphincter muscles at the end of the digestive tract is the anus.