Which answer best describes this reaction?

C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O bonded to H + H bonded to O bonded to C bonded above and below to H and to the right to C. Also bonded above, below, and to the right to H right arrow C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O. That O is bonded to C bonded above and below to H and to the right to C, bonded above, below, and right to H + H Subscript 2 Baseline O.

formation of an ester by condensation
formation of an ether by condensation
formation of a new product using a substitution reaction
formation of a new product using an addition reaction