i don't know any plants but i do know a couple animals: labradors and bunnys. bunnys change to the "color" of the season. winter its white (and fall), spring its brown (and summer). labradors shed its fur in the spring and summer, and grows it in fall and winter. if this isn't the info your looking for, Google it.
there are more animals and plants in summer because the weather is better and food is more plentiful. in winter many animals hibernate or migrate because its too cold and there is not enough food to eat.
no, they happen every 2 yrs. going summer winter summer winter
some animals that can survive the winter and not the summer go for long summer sleep.
Some animals are different.
The ones that are around in the summer hide away and the winter animals come out, such as penguins. There you go ((-:
A pagwen in winter and a monark butterfly in summer
because they sleep...in the winter and show in the summer
Some animals of the squirril family do this yes.
Oxygen is produced by living plants. Plants use Carbon Dioxide, Water and Sunlight to make Sugars and Oxygen. As sunlight is required and there is more of this in summer, more oxygen is produced in summer than winter.
Plants and animals survive harsh environments in a variety of different seasonal behaviors. This can include migration, building underground homes, and plants flowering for a particular season.
it can effect it by getting to hot and drying it up
Winter is not a person (you asked "Who is winter") , it is a season. In the southern hemisphere region winter happens during the northerner summer period.