Question

These clouds appear long, flat, and spread across the sky.

Cirrus
Stratus
Cumulus
Stigform

Answer 1

I think the answer is Cirrus. They are flat feathery clouds that usually stretch long distances over the sky.

Answer 2

Stratus –layered or sheet like, low (50 - 6500 feet) Cumulus – puffy cotton balls, vertical development Nimbus – dark and rainy Cirrus – feather-like, high (20 000 feet) Alto – medium altitude (6500 - 20 000 feet)