Which statement best describes the greenhouse effect? It is a process by which plants are able to grow well in a warm, enclosed structure.
It is a process by which greenhouse gases block the sun’s light to penetrate the atmosphere.
It is a process by which greenhouse gases allow the sun’s light to penetrate the atmosphere but stop the heat from escaping.
It is a process by which prevailing winds bring moisture to the land, to the prevailing wind direction

dipole moments occur when there is a separation of charge. they can occur between two ions in an ionic bond or between atoms in a covalent bond; dipole moments arise from differences in electronegativity. the dipole moment is a measure of the polarity of the molecule.

explanation:

in inorganic chemistry -dipole moment ( μ ) is the measure of net molecular polarity, which is the magnitude of the charge q at either end of the molecular dipole times the distance r between the charges. μ = q × r.