Final answer:
The phrases "Hostile Animals," "Remove Stiffness after Tracking," and "Shortness of Breath" may be capitalized because they could be titles or headings, which require such capitalization. If these phrases are part of regular text and not proper nouns or at the beginning of sentences, this would typically be against capitalization rules in English grammar.
Step-by-step explanation:
The phrases "Hostile Animals," "Remove Stiffness after Tracking," and "Shortness of Breath" are capitalized because they could be titles or headings, which would require capitalization. In English, titles and headings often capitalize the first letter of major words. However, if these phrases are not titles and appear in regular text, this capitalization would be considered incorrect, unless they are proper nouns or at the beginning of a sentence.
In other contexts, such as in certain styles of writing or for emphasis, phrases might be capitalized; creative writing and poetic license could allow for such use. But in formal writing and proper grammar, overuse of capitalization is generally avoided.