These animals are likely chosen because of their association with darkness.
because it is important to study about animals
There are many theories as to why the colors black and orange were chosen for Halloween. Then most common is that orange was chosen because of the autumn harvest and pumpkins; black was chosen because of darkness/night and because of Halloween's association with the festival, or day, of the dead.
Animals are tested because they are healthy and no disease they could possibly have or any meds they are on will effect what they are doing with the testing.
The logo was created to capitalize on the success of their name, Penguin Books. The penguin was chosen as a memorable and distinctive symbol for the brand due to its association with books and because penguins are well-liked animals that are also associated with intelligence and curiosity.
Barbara Mandrell
Because she is the Chosen One. And everyone loves the Chosen One. Because the Chosen One is like, the Chosen One, man.
'Not knowing it' is the key phrase in your question. Can this sale be accomplished in secret? The answer is no. If you've chosen to ignore or have chosen to disregard notices from the association -- based on your failure, then the sale has not taken place 'in secret'.
because he is chosen to do surdery
This should be dealt with in the Association's Constitution. There are countless examples on line. The Chair, along with the other Officers and Committee are chosen at the Annual General Meeting.
Leaders are chosen because of the citizens electing them.
polonium was chosen because it gives colour to fireworks
The book is called Animal Farm, and the pigs were actually a representation of communist government