I assume that it's a hominid fossil - since it has tools and mostly only hominids are found to use tools (although birds are also known to use tools).
It could be Homo erectus, which lived between 2 million years ago and 70 000 years ago, but more likely it's homo habilis, which lived from 2.5-1.5 million years ago.
Answer:
The positively charged subatomic particle in the nucleus of an atom is the proton.
Explanation:
Atom; is not correct because it is not a subatomic particle, but instead, those particles are part of it.
Protons; is correct because they are the subatomic particles that are positively charged.
Electrons; is not correct because they are subatomic particles that have a negative charge.
Neutrons; is not correct because they are subatomic particles that have no charge,
Electrical charge; is not correct because it is not a subatomic particle, and it developes from the interaction of them.