Mouth lining Makes, stores and destroys blood cells
Gullet
respiratory surface on the lining of their mouth
on which gas exchange takes place readily.
Esophagus
Tube that connects the mouth and the
stomach in a frog
Pancreas
Is the opening to a short esophagus
Spleen
Stores food and mixes it with enzymes to begin
digestion
Stomach
Gland which secretes digestive enzymes into
the duodenum
Mesentery
A membrane that holds the ileum together

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the answer is minerals.