(Q).
Q: The pain of angina means the heart muscle fibers need more what? Read this paragraph and choose the correct option from the provided answers: Coronary heart disease often does not have any symptoms. A symptom of coronary heart disease is chest pain. Occasional chest pain can happen during times of stress or physical activity. The pain of angina means the heart muscle fibers need more oxygen than they are getting. Most people with coronary heart disease often have no symptoms for many years until they have a heart attack. Choices: - water - carbon - nitrogen - oxygen A:
(A).
oxygen

(Q).
Q: The energy in sunlight is also known as what kind of energy? Read this paragraph and choose the correct option from the provided answers: The energy in sunlight, or solar energy, can be used to heat homes. It can also be used to produce electricity in solar cells. However, solar energy may not be practical in areas that are often cloudy. Choices: - kinetic energy - potential energy - geothermal energy - solar energy A:
(A).
solar energy

(Q).
Q: During birth, a baby passes from the uterus through what organ to leave the body? Read this paragraph and choose the correct option from the provided answers: The vagina is a cylinder-shaped organ that opens to the outside of the body. The other end joins with the uterus. Sperm deposited in the vagina swim up through the cervix, into the uterus, and from there into a fallopian tube. During birth, a baby passes from the uterus through the vagina to leave the body. Choices: - Ovary - the urethra - Esophagus - the vagina A:
(A).
the vagina