Which of these sentences includes an abstract noun in its context is it infatution with tennis occupies most his time or the full moon moved slowly across night sky?

Here's why:

* Infatuation is an abstract noun. It represents a feeling or concept (intense and unreasoning passion), rather than a physical object.

Let's break down the other sentence:

* Full moon and night sky are concrete nouns. They refer to tangible things that can be seen and experienced.

Therefore, only the first sentence contains an abstract noun.