Best answer gets brainiest ! what does the negative in negative feedback mean?

Acar traveld with an average speed of 60 miles per hour for 2 hours. how far did it travel

The response is the basis for vaccination. primary secondary tertiary none of the above

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.