The correct answer is a. the population will decrease of white moths.
The white satin moth, also known as the satin moth or Leucoma salicis, is a member of the Erebidae family of moths. Carl Linnaeus published the first description of the species in the tenth edition of Systema Naturae published in 1758. It can be found in Europe, including the British Isles, but not in the far north. Additionally in North America, where it was first introduced in the 1920s. The wingspan is between 37 and 50 mm. White, occasionally ochreous, or in the male, even with a blackish costal edge; dark on the head, collar, and antennal pectinations. Broad black rings on the tarsi and tibiae. The East Asian species Leucoma candida has distinct male genitalia, considerably purer glossy white wings that are completely opaque and have thicker scales, and it is generally smaller with narrower wings.
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