What if the rock contained a fern fossil?

need more explanation, but here is the possible response...

Explanation:

Seed Ferns, which are technically called (Peridospermatophyta), are some of the most common plants in the Carboniferous coal forests. They are often preserved as intricate carbon films and are prized by fossil plant collectors.

the answer would be c. motion and direction

i hope this : )

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.