What kind of chemical reaction is this Li + H2O = LiOH + H2
synthesis, combustion, decompostion, or replacement reaction?

from the lies this is synthesis reaction

Explanation:

It's also oxidation-reduction reaction. Li is oxidised and

H is reduced

Li + H2O = LiOH + H2

Explanation:

these are chemical reactions of synthesis and decomposition

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.