Before - question, research, hypothesis, experiment, conclusions
The answer is A, Viruses
Viruses cannot reproduce on their own , so they have to inject their DNA or RNA into the nucleuus of a cell. By doing this, the virus will take over that cells and within times, that cells will pop up and producing more viruses.
This reproduced virus will repeat the same process until our immune systems stop them
Segments of DNA that contain the code for specific proteins are called genes

¿What is the Kingdom Plantae?
It is one that is composed of multicellular, eukaryotic, autotrophic, anaerobic and immobile organisms whose reproduction is sexual or asexual.
They are classified in :-
I hope I've helped : )
The process by which molten material moves through the Earth's mantle is known as convection current. This is simply demonstrated within a liquid, in this case molten material, in which the hottest materials rise and the colder materials sink. Convection currents in the mantle are the forces that help move plate tectonics.