Amazon.com Inc. stated that it recently removed a three year-old book regarding transgender issues from its platforms because it was decided not to sell books that frame transgender and other sexual identities as mental illnesses.The company explained its decision in a letter on Thursday to Republican Sens. Marco Rubio of Florida, Mike Lee of Utah, Mike Braun of Indiana and Josh Hawley of Missouri, which was reviewed by the Wall Street Journal. The Senators had written last month to Chief executive Jeff Bezos requesting an explanation of why “When Harry Became Sally: Responding to the Transgender Moment” was no longer available on Amazon nor on its Kindle and Audible platforms.Amazon’s decision comes as the nation’s largest tech platforms are under increased scrutiny regarding the decisions they make over which content is acceptable. The senators, in their letter dated Feb. 24, characterized Amazon’s decision to remove the book as a signal “to conservative Americans that their views are not welcome on its platforms.”