Which percussion instrument accompanies the trumpets in the selection of Benjamin Britten young person's guide to the orchestra?

In Benjamin Britten's "Young Person's Guide to the Orchestra," the percussion instrument that accompanies the trumpets is the timpani. The timpani provides a rhythmic foundation and enhances the overall texture of the piece, complementing the bright sound of the trumpets. Britten's orchestration effectively showcases the interplay between the brass and percussion, illustrating the diverse timbres of the orchestra.