Please answer the following question: Trigonalidae - The Trigonalidae (sometimes spelled Trigonalyidae but the former spelling has formal precedence; see the Trigonalidae Website) are one of the more unusual families of hymenopteran insects of indeterminate affinity within the suborder Apocrita (though sometimes believed to be related to the Evanioidea) and presently placed in its own superfamily Trigonaloidea. The Trigonalidae are divided into two subfamilies Orthogonalinae and Trigonalinae. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Animal