Mallika was selling vegetables in her cart along with her mother. They were able to earn a profit of around Rs.200 every day. Even though the amount was not substantial it was sufficient for a decent living. Mallika often noticed that nuclear families where both husband and wife go to work find it difficult to cook as cleaning and cutting vegetables took a lot of time, so an entrepreneur she started gathering information regularly and developed a new product line of selling cut vegetables in hygienic packaging. Mallika used _________ trend to spot this idea.