Explanation:

<em><u>Bitcoin is a digital currency which operates free of any central control or the oversight of banks or governments. Instead it relies on peer-to-peer software and cryptography. A public ledger records all bitcoin transactions and copies are held on servers around the world</u></em>
Answer: The uprising was triggered in 1676 when a grab for Native American lands was denied.
Explanation:
Answer:
<em>Longitudinal study
</em>
Explanation:
A longitudinal study (or longitudinal survey, or panel analysis) <em>is a research design requiring repeated measurements of the same variables</em> (e.g., humans) across short or long periods of time (e.g. using longitudinal data).
Studying the elephants across long periods of time to determine their intelligence.
It is often a form of observational study, although it could also be described as randomized longitudinal experiments.
Jean Piaget is known for his<span> theory of cognitive development . This theory is a comprehensive theory about the nature and development of human intelligence.</span>
According to Piaget, children develop through a series of stages that are predictable, but some children never obtain the most advanced stages