Which one is it ?

Question : which of the following is a response cause by external stimulus
1) vomiting due to a virus
2) running away when frightened
3) release of hormones to regulate blood sugar levels
4) clipping toe nails

Which situation is an example of competition that could be found in the grassland? a. two lion populations utilize the same gazelle population as their main food source b. deer eat berries and their droppings seed new areas, creating new berry bushes c. two shark populations utilize the same fish population as their main food source d. lack of sunlight due to changes in the seasons restricts the growth of certain plants

Which type of scientific statement is defined as a hypothesis or group of hypotheses that can be accepted as true based on the repeated experimentation with similar results

What substance acts to prevent sudden ph changes in bodily fluids?