Why are arctic tundra herbivores able to survive in their ecosystem? (Select all that apply.) They can survive on short plants, mosses, and lichens. They migrate to the south
during the cold months

They can change their internal temperature when needed.

They have extra fur to protect against the cold.

2cool and cold temperature unless its an ever green tree 

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.