The correct answer is D.) Atom ,
Everything in the universe is made of atoms , and matter is too.
Anything that takes up space is usually considered matter.
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Ichthyology is best characterised as Science. None of the other field of studies apply to Ichthyology.
Pseudoscience are beliefs or theories that have been considered scientific. However, they are disapproved scientifically because lack of facts and evidence.
Cryptozoology is study of animals that are rumoured to exist. (Bigfoot, Loch Ness Monster, etc) It is connected with pseudoscience.
Mythology can refer to myths or the study of myths.
As you can see, the study of fish does not apply to any of the area of studies except for Science. Ichthyology applies to Science, because it is a scientific study is different aspects of various species of fish. This includes history, behaviour, and growth.
One on one training is the form of training which considers the special
needs of individual food handlers.
<h3>What is Training?</h3>
Training involves teaching individuals different practices about a certain
topic to ensure smooth execution of tasks.
Individuals have different needs which is why a One on one training is
necessary to ensure that adequate teachings are given in order to tackle
their special needs.
Read more about Training here brainly.com/question/17508016
I believe the answer is B. they respond to stimulli