Q1. Give one-word substitute for: a large number of fish swimming together.
Explanation
A shoal is a large group of fish swimming together, so it exactly matches the phrase in the stem. A troupe is a company of performers, especially dancers or actors, not fish. A swarm is usually a large moving group of insects such as bees or flies, so it does not fit this animal group. A litter refers to young animals born to the same mother at one time, such as puppies or kittens. Therefore, shoal is the precise one-word substitute.
