Which is the first stage of 'memory' in the learning process?

→ Which theorist described 'Interference' in learning? → Under J.P. Guilford's Structure of Intellect Model, intelligence is classified into three independent dimensions: Operations, Contents, and Products. When this model was expanded, what became the total number of factors, and under which dimension does 'Memory Retention' fall in this classification? → What is the biggest advantage of the 'Wechsler Scale' for intelligence testing? → What does 'Working Memory' measure in the Wechsler scale for intelligence testing? → Who is considered the father of educational psychology? → With reference to the structure of the solar system and the universe and the motion of celestial bodies, consider the following statements: 1. Most of the mass and angular momentum of our solar system is contained in the Sun, and the energy production within the Sun mainly occurs through the 'Proton-Proton Chain' nuclear fusion reaction, under which four hydrogen nuclei combine to form one helium nucleus. 2. The Asteroid Belt is mainly located between the orbits of Mars and Jupiter, where 'Ceres' is the largest dwarf planet, and this belt was prevented from consolidating as a large planet due to the powerful tidal forces of Jupiter. 3. The Oort Cloud, which is a vast spherical envelope of icy celestial bodies located at the outermost boundary of the solar system, is considered the main source of long-period comets, and it is located at the extreme end of the Sun's gravitational field. 4. According to data from the Hubble Space Telescope and the James Webb Space Telescope, the expansion of the universe is occurring at a constant speed, mainly caused by the attractive force of 'Dark Matter', which brings galaxies closer together. Which of the above statement(s) is/are completely true?