Mythologically, Brahma became the creator, Vishnu, the preserver and Mahesh or Shiva was the destroyer of this universe. All three came together and decided on their roles per their prakruti.
Maa Saraswati, the goddess of knowledge and wisdom. Also, she makes us more indulgent towards art, culture and literature.
As per this mythological story, once, while Lord Brahma was meditating. He was so lost in it that he didn’t notice a few petals of his lotus flower falling on barren land, on earth.