The word empty as an over whelming negative connotation when you are feeling empty you are typically in a lowered state, and or sad/depressed.
The correct answer to this open question is the following.
Although there are no options attached, or further references, we can say the following.
The key detail that is missing in the summary is that Phillip decided to pay close attention to Henry's clues so that he would know exactly when to place Henry in his bed.
It is correct to say that Phillip adopted Henry from the humane society. Immediately, Phillip trained Henry to sleep in his own bed. Philip was effective in training Henry because he followed the advice of using consistency with love. But we have to add the important fact that Phillip decided to pay close attention to Henry's clues so that he would know exactly when to place Henry in his bed.
That was an important factor in the learning process because that is how Philip realized what the dog was trying to tell him with its actions, and according to the training manual, mutual understanding between the owner and the pet, is very important.
Answer:
My grandfather spoke so quietly that his words were almost inaudible.
Explanation:
We are supposed to use the infixes (formative elements of a word) to form a word that will complete the sentence properly. According to the sentence, the speaker's grandfather spoke quietly. We can safely assume it was difficult for the speaker to hear the words his grandfather said. In that case, we need "aud", which is connected to the verb "hear". Since it was not possible to hear, we also need "in-", meaning "not", and "-ible", meaning "can be done". Together, they form the adjective "inaudible", which means "unable to be heard".
When we complete the sentence, it becomes:
My grandfather spoke so quietly that his words were almost inaudible.
It is a book about botany/environment.