Plants tend to grow toward air with higher humidity because of phototropism geotropism hydrotropism thigmotropism

For the answer to the question above, the answer is "Hydrotropism".

Hydrotropism hydro means water in which Tropism meaning involuntary orientation by an organism, that involves turning or curving as a response to a stimulus a plant growth response in w/c the direction of plant growth is determined by or gradient in water concentration. A common example is planting roots growing in humid air bending toward a higher humidity level.

C14 dating since carbon is present in both living and no living objects .