Girl covering his ears while parent quarreling in background

Businessman inviting questions from the audience at a business conference

Male audience member at a business conference asking a question

Audience at a seminar raising hands to ask questions

Audience at a seminar raising hands to ask questions

Schoolboy doing mathematics on chalkboard in classroom 4k

Male audience member at a business conference asking a question

Audience at a seminar raising hands to ask questions

Sad schoolboy sitting alone on staircase

Depressed woman sitting near car

Super Slow Motion Shot of Flying Empty Plastic Waste on Blue Gradient Background at 1000fps.

Depressed woman sitting near car

Super Slow Motion Shot of Flying Empty Plastic Waste on Blue Gradient Background at 1000fps.

Super Slow Motion Shot of Flying Empty Plastic Waste on Blue Gradient Background at 1000fps.

Disappointed Angry Writer Failed

Mathematical equations against black background

Students raising their hands in class

Caucasian boy raising his hand in class

Crowd chanting environmental slogans, awareness

Girl with violet hairstyle is tired, bored of work or studying, she disappointed, helpless

Conflicting adult couple seeing family consultant

Female audience member at a business conference asking a question

Portrait of young bussiness woman using laptop computer looking at screen at home office, frustrated shocked after reading bad online news email with failed test exam results feel upset about problem

The businessman has problems, he is studying a book looking for a solution

Afro-american father and teenager arguing, boy

Touching mouth with hand painful expression because of toothache or dental

Senior man suffering from back ache.

Teenagers in a school classroom

Portrait of woman in a protective mask on a dusty road. Ecology problems concept

Black question mark on a piece of white paper. Close-up hand holding symbol

Depressed man sitting near a car 4k

The concept of social problems and suicide

Aggressive man threating to hit wife

Adult attractive upset businessman feeling stress, crying sobbing, wiping his nose with napkin handkerchief, close up emotions of grief. Office worker male comically funny suffering sitting at table

Young businessman who received bad news through a message on a smartphone. Frustrated young man.

Sad schoolboy sitting alone on staircase

Blue studio portrait of girl, she exhales from heat or stuffiness, waves arms at herself. Young

Portrait of bearded guy taking off his glasses and thinking while walking at city street. Close up

Business people attending to a meeting in conference room

Displeased woman suffers from lower back pain.

Couple ignoring each other near car

Nervous stressed african american man biting his nails

Student raising his hand in class

Close up depressed businessman suffering from headache.

Pretty girl in medical protective mask disapproving with no finger sign make negation gesture

Husband and wife arguing during consultation

Mature woman suffering from throat pain.

Black desperate businessman on blurred background.

Man flirting during romantic date

Black man thinking about problem solution, orange background