Read the following passage carefully and answer the questions given below it. Certain words have been highlighted for your attention.

Boredom comes in a period of thought where none of my interests are being consciously struck. It’s a selfish concept so to speak. Ideally, as individuals, we would never be bored if we found happiness in all things. Everyone has their own interests and their own tastes. That's a simple phrase that almost everyone knows, but in the grand scheme of things, it means a lot. This freedom of self-concept is the window for boredom to arise. When I am happy with what I am doing, I am not bored. However, even happiness has its limits. I only want to do things for so long before I grow tired of them.

The sensation of boredom is described as feeling weary because one is unoccupied or lacks interest in one's current activity or environment. In 1980 Robert Plutchik created the wheel of emotions. It consisted of 8 basic emotions — anger, fear, sadness, disgust, surprise, anticipation, trust, and joy. Robert’s model made connections _______ the idea of an emotion circle and a color wheel. Like colors, the primary emotions can be expressed at different levels of intensity and can be mixed with one another to form different emotions that one may feel.

Life, itself, existing might not be enough to conquer boredom. The slow process of enlarging a hole by repetitive movements is called boring. This may be why things, that are slow and repetitive that don’t appear to be going anywhere, came to be described as the same word, these things are boring. Boredom, which means being temporarily uninterested in anything happening, has been found as far back as ancient Pompei. Boredom is a feeling we, as humans, don't like, and it happens to everyone. But now we have Facebook, Youtube, Google, and iPhone games to keep ourselves occupied. So why do we get bored and why is boredom important? Although boredom seems trivial to humans, boredom is actually exciting because it is the most unique emotion of all.

What will fit in the blank taken from the passage. "Robert’s model made connections _______ the idea of an emotion circle and a color wheel."