30. Select the word that means 'on both sides.'

Answer: A

Explanation:

bilateral

The term 'bilateral' refers to something that is on both sides, making it the correct choice in this context.

A) bilateral

This option is correct because 'bilateral' specifically denotes an occurrence or condition that exists on two sides, such as bilateral agreements in politics or bilateral symmetry in biology.

B) insufficient

This option is incorrect as 'insufficient' means not enough or inadequate. It does not relate to the concept of being on both sides and therefore does not fit the definition being sought.

C) bicuspid

This option is incorrect as 'bicuspid' refers to having two cusps or points, typically used in dental terms. While it may imply a dual nature, it does not directly mean 'on both sides.'

D) congruent

This option is incorrect because 'congruent' refers to figures or objects that are equivalent in shape and size. It does not convey the idea of 'on both sides' and is therefore not applicable.

Conclusion

The term 'bilateral' is definitively the correct answer as it clearly describes the concept of being on both sides, which is the essence of the question. All other options fail to capture this specific meaning, demonstrating a lack of relevance to the definition being requested.