According to the Fundamental Theorem of Algebra, a polynomial of degree \( n \) can have at most \( n \) roots (or zeros), counting multiplicities.
The polynomial given is \( f(x) = 7x^6 - 5x^5 + x \). The highest degree of this polynomial is 6 (from the term \( 7x^6 \)).
Therefore, the greatest number of zeros that this polynomial can have is:
6
So the correct response is 6.