The correct answer is B. Blood.
Chlorophyll is a green pigment that is found in plants. It is responsible for absorbing sunlight and using it to convert carbon dioxide and water into glucose and oxygen. Haemoglobin is a protein that is found in red blood cells. It is responsible for carrying oxygen from the lungs to the rest of the body.
The relationship between chlorophyll and plants is that chlorophyll is necessary for plants to photosynthesize. Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen. Glucose is a type of sugar that plants use for energy. Oxygen is a gas that is released into the atmosphere.
The relationship between haemoglobin and blood is that haemoglobin is necessary for blood to carry oxygen. Blood is a fluid that circulates through the body. It carries oxygen from the lungs to the rest of the body and carbon dioxide from the rest of the body to the lungs.
The other options are not correct because they do not have the same relationship to haemoglobin as chlorophyll has to plants.
- Option A, haemorrhage, is a medical term for bleeding. It is not necessary for haemoglobin to cause bleeding.
- Option C, oxygen, is a gas that is carried by haemoglobin. However, oxygen is not the same thing as haemoglobin.
- Option D, red, is the colour of haemoglobin. However, colour is not the same thing as function.