'Constrain' fits best as it indicates a limitation on the employees' ability.

'Therefore' indicates a cause-and-effect relationship.

'Therefore' indicates that his preparation was a result of his studying.

'Gregarious' means fond of company; sociable is the best fit.

'sorrowful' is the odd one out as it has a negative connotation, while the others are positive.

Sad is the only word that conveys a negative emotion, while the others are positive.

Carrot is a vegetable, while the others are fruits.

'sad' is the odd one out as it has a negative connotation, while the others are positive or neutral.

Teacher is the only profession that is primarily educational, while the others are in the medical field.

Slow is the only word that indicates a lack of speed, while the others indicate speed.

Gloomy is the only word that conveys a negative emotion, while the others are positive.

Joy is a positive emotion, while the others can be negative.

Timid is an antonym of the other three words.

Slow is the only word that indicates a lack of speed, while the others indicate speed.

Learn is the only action that involves receiving knowledge, while the others involve giving knowledge.

'Flower' is a homophone for 'flour', sounding the same but having different meanings.

'Happiness' is a noun, while the others are not.

'Under' is the preposition in the sentence.

'Under' is the preposition that shows the relationship between the cat and the table.

'Distribute' means to allocate resources or items, making it a synonym for 'allocate'.

'Candid' means truthful and straightforward; thus, it is synonymous with 'honest'.

'Challenging' is a synonym for 'difficult', indicating something that requires effort to overcome.

'Meticulous' means showing great attention to detail, which is synonymous with 'thorough'.

'Guide' is a synonym for 'navigate'.

'Delay' means to put off to a later time, which is synonymous with 'postpone'.

'Vivid' means producing powerful feelings or strong, clear images in the mind, which is synonymous with 'bright'.

'Joyful' is a synonym of 'happy'.

'Tall' describes the noun 'building', making it an adjective.

Tall describes the noun 'building' and is therefore an adjective.

'Pessimistic' means having a negative outlook, which is the opposite of 'optimistic'.