The correct answer is Stimulus.
A thing or an event that provokes a specific functional response in an organ or tissue of an organism is called as stimulus. It can be anything like heat, light, water, chemical et cetera. Any stimulus when encountered by the organism produces response in reference with the stimulus generated by the external environment or other organism.
Pollution
Primary succession
Primary succession describes the process of the series of photographs. thus, option D is correct.
Primary succession, type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals first colonize a barren, lifeless habitat. Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community.
The process, primary succession, would best describe the series of photographs when all of the topsoils were destroyed after the eruption. There is just one thing to remember about this, the primary succession occurs on the land that has nothing and is the soil-building process.
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Answer:
the answer is D mollusks, echinoderms, chordates, and annelids
Explanation:
The trait causes a change in the environment surrounding the organism.
The trait decreases the number of genes in the body cells of the organism.
The trait is due to the genetic code present in the organism’s gametes.