It can be inferred that the words or punctuation marks that show that Goodall is concerned about the topic is exclamation marks (!).
To infer is to conclude or make a conclusion based on textual evidence which is rational and logical.
Exclamation marks are used to indicate strong language in a text.
Recall that punctuations are symbols that help to reinforce or give meaning to words, sentences or phrases.
Other examples of different punctuation marks are;
In order to clearly convey meaning, punctuation is the use of standardized marks and indications in writing to group words into sentences, clauses, and phrases.
Punctuation marks are the names for the symbols or signs. Readers can interpret punctuation marks as signals.
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