To set up your fish aquarium, you must first decide where to put your tank. You should place your fish tank on a stable, sturdy
piece of furniture, such as a table. Pick a spot away from direct sunlight, as direct sunlight can harm some fish. After placing your tank in its chosen spot, place a small layer of pebbles at the bottom of the aquarium. Then, put a few underwater plants or other decorations on top of the pebble layer. After adding decorations, fill the tank with water. Because the water will make the tank heavy, fill the tank by using a clean pitcher filled with water. That way, you will not have to move your tank after it is full of water. Finally, put your new fish into your aquarium. Which of these details does NOT support this paragraph’s main idea? A) Fill the tank with water until it reaches about three inches from the top. B) Before you buy a pet you should consider the care and attention it will need. C) The pebble layer should be about three inches thick and cover the entire bottom. D) Make sure that any decorations you put in the tank are designed for fish aquariums. Eliminate
Answer: B) Before you buy a pet you should consider the care and attention it will need.
Explanation: In the given paragraph we can see a series of steps to correctly set up a fish aquarium. From the given options, the one that does not support that main idea is the corresponding to option B: Before you buy a pet you should consider the care and attention it will need, because this option is referring to the pet, and the paragraph just refers to the instructions for placing, preparing and filling the aquarium with water.
This happens quite a lot in verbs e.g run to running. It is because you double the last consonant in a one-syllable noun for it to become a verb. (Keep in mind there are exceptions to this rule.)