What of these is not a type of sentence?

Examples of homologous organs are -

In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Everything (1) _________ us makes our environment. Living and non-living things form the (2) _________ of our surroundings. Plants, animals and microbes are parts of our environment. Humans have affected the environment in multiple (3) ______ like clearing of forests, building houses and farms, making roads, etc. This is the root (4) _______ of air, water and land pollution on the planet. Ecologists across the globe are making efforts to educate mankind about the (5) _________ of nature, the crisis we face and the methods of managing these crises.

Select the most appropriate option to fill in blank number 1.

Which of the following is not a major component of the food?

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and –, 7 and 3

Which letter-cluster will replace the question mark (?) to complete the given series?

LMR, PUA, TCJ, XKS, ?

In human beings, the small intestine is coiled and is about ______ metres long. 

A form of financial service which provides small loans and other financial services to poor and low-income households is called ______.