Question

how does the nest keep weaver birds dry?
the big nest makes shade that keeps the birds cool. feathers and grass in each room keep the birds warm. rain runs off the slanted roof. the birds stay dry.
weaver birds know how to work and live together. they know how to build big.
a big nest protects weaver birds.
the nest has feathers.
the nest makes shade.
the nest has a roof.

Explanation:

The text states that "Rain runs off the slanted roof. The birds stay dry." This directly explains how the nest keeps the weaver birds dry. The other options, such as the nest having feathers (which keep the birds warm) and the nest making shade (which keeps the birds cool), do not address the dryness aspect related to rain.

Answer:

The nest has a roof.