A Study to Investigate the Efficacy and Safety of Dupilumab Therapy Compared With Placebo in Participants Aged ≥18 Years With Moderately to Severely Active Ulcerative Colitis With an Eosinophilic Phenotype (LIBERTY-UC SUCCEED (Study in UC for Clinical Efficacy Evaluation of Dupilumab))

Inclusion Criteria: * Participants must be ≥18 years of age at the time of signing the informed consent. * Evidence of biomarker enrichment at time of screening. * Moderately to severely active UC, defined as a baseline modified Mayo score of 5 to 9, inclusive, using the Mayo endoscopic subscore assigned during the concurrent local and central reading of the video endoscopy. * Has a screening endoscopy with ≥2 endoscopic subscore in the Mayo score component assessment as determined by concurrent local and central reading of the video endoscopy. * Has a baseline rectal bleeding subscore of ≥1 and baseline a stool frequency score of ≥1 as determined by the Mayo score component assessment. * Participants with inadequate response/non-response, loss of response, or are intolerant of standard biologic therapy for their UC AND/OR Inadequate or non-responders, have shown loss of response, or are intolerant to at least 1 of the following treatments: oral corticosteroids (≤20 mg/day), 5-aminosalicylic acid (ASA) compounds, immunomodulators, small molecules. Exclusion Criteria: Participants are excluded from the study if any of the following criteria apply: * Severe extensive colitis as evidenced by: * Current hospitalization * Likely to require surgery for the treatment of UC within 12 weeks of Screening Visit * UC limited to the rectum only or to \<20 cm of the colon as determined by central reading. * Presence of an ileal pouch, ostomy, stoma or fistula or history of a fistu…