What group is this Element in?
Group 3
Group 4
Group 7
O Group 1

Explanation:

It contains the elements titanium (Ti), zirconium (Zr), hafnium (Hf) and rutherfordium (Rf). This group lies in the d-block of the periodic table. The group itself has not acquired a trivial name; it belongs to the broader grouping of the transition metals.

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explanation:

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b) mutualism

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