Read this sentence. Some animals feed on acorns, and these animals actually help plant trees by
spreading seeds around.
Which is the best revision of the sentence?

By spreading seeds around there are animals that feed on acorns and
actually help plant trees.
Actually they help plant trees by spreading seeds around when animals
feed on acorns.
Animals feed on acorns, and they actually help plant trees by spreading
seeds around
Animals that feed on acorns actually help plant trees by spreading seeds
around