Look at the text below. If there is an error with subject-verb agreement, select the incorrect verb and type it correctly. Otherwise, submit the text without making any changes. Within the nucleus of an atom, each proton and neutron have approximately the same mass

Within the nucleus of an atom, each proton and neutron approximately have the same mass.

comfortable

explanation:

one type of the adjectives is predicate adjective. a predicate adjective is an adjective which follows a linking verb and modifies or refers back to the main subject of that linking verb.

it usually is used just before the noun it modies.

here in this example:

'penguins seem comfortable in the coolest habitats', comfortable is the predicate adjective which follows the linking verb 'seem' and modifies the noun.

the best and most correct answer among the choices provided by your question is the second choice.

the sentences  articulate the philosophical concept of altruism.

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