Sponsored photos by

Clarifier is a settling tank built with mechanical means for solids removal being deposited by sedimentation. It is used to remove solid particulates or suspended solids from liquid for thickening.
Artist studio. Man creating artwork. Board with painting on desk. Serious facial expression. Concentration contemplation.
Focused Asian school boy using digital tablet at class in classroom. Attentive junior school student learning online virtual education digital program app tech during stem computer science lesson.
Yoga woman practising her strength and balance. Young woman doing complex Yoga exercise. Concentrated sport girl do yoga in the park.
Depression symptoms trouble concentrating. Young man has difficulty concentrating and is slowed thinking

Free stock photosconcentrated (508)