What were four important findings from this long-term study of the chimps in Gombe

What are four important findings from this long-term study of The Chimps in Gombe? The chimps make tools to catch food, they are very protective of their food, they will kill a baboon or another chimp, and they are very curious.

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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   c.) 1575 j.

explanation: