O summarize, the elaboration model of instruction starts by presenting knowledge at a very general or simplified level in the form of a special kind of overview. Then it proceeds to add detail or complexity in "layers" across the entire breadth of the content of the course (or curri

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 answer is b. the tracer looks harmless in flight, but the pilot’s bitten lips and white knuckles suggest how dangerous it can be.