Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

D. natural gas

Explanation:

Fossil fuels are the source of energy that are excavated from the deep layers of the earth crust. They are produced after year long microbial activity over the decayed plant and animal matter. Natural gas is the fossil fuel which is a naturally occurring natural gas which primarily consists of methane, but also contains alkanes, carbon dioxide, hydrogen sulfide, and helium.

It is the most common type of fossil fuel used for heating and cooking purposes. As it is cheapest in price as compared to other fuels and emits less amount of gaseous waste after combustion. Therefore, does not create pollution in house when used for heating and cooking.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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