How much cooler are sunspots than the sun

Which potential solution below best addresses the issue of loss of biodiversity in a north american ecosystem?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

What is the compliment dna strand to the following sequence: ttgactaggcta