Which molecule produces the strong absorption bands in the spectrum of a cool M-type star,as can be seen in Figure 10-5 of Comins,Discovering the Essential Universe,6th ed.?

Question

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The strong absorption bands in the spectrum of a cool M-type star are produced by titanium oxide (TiO) molecules. This is shown in Figure 10-5 of Comins, Discovering the Essential Universe, 6th ed. TiO is present in the cooler outer layers of M-type stars and absorbs light at specific wavelengths, creating these distinctive absorption bands.

Which Molecule Produces the Strong Absorption Bands in the Spectrum