32. The correct answer is D. The outer planets (Jupiter, Saturn, Uranus, Neptune) are known for being large, having many moons, and possessing ring systems. They are farther from the sun than the inner planets. Therefore, the statement "They are closer to the sun" is not true. 33. The correct answer is A. Plants require sunlight to perform photosynthesis, the process by which they produce their own food. Without light, photosynthesis cannot occur, so plants cannot grow at the bottom of the sea where there is no light. 34. The correct answer is B. Incisors are the front teeth that are flat and chisel-shaped, used for cutting and biting food. Canines are pointed, and molars/premolars are broad for grinding. 35. The correct answer is C. The four chambers of a ruminant stomach are the rumen, reticulum, omasum, and abomasum. The oesophagus is the tube that connects the mouth to the stomach, not a chamber of the stomach itself. 36. The correct answer is D. Commensalism is an association between two organisms in which one benefits and the other is neither helped nor harmed. 37. The correct answer is A. Renewable sources of energy are those that are naturally replenished or regenerated over a relatively short period after being used. 38. The correct answer is B. Parasitism is a symbiotic relationship where one organism (the parasite) benefits at the expense of the other organism (the host), causing it harm. 39. The correct answer is C. A diastema is a gap or space between teeth, commonly found in herbivores between the incisors and molars/premolars, which aids in manipulating and processing food. 40. The correct answer is D. Heat from the sun travels through the vacuum of space to Earth primarily by radiation, which involves the transfer of energy via electromagnetic waves. Conduction and convection require a medium for heat transfer.