Answer:
Physical features can refer to geographical features of a place or the physical, tangible characteristics of a person. Diversity refers to variation and variety, and the Lower 48 is a colloquial term for the contiguous United States. Abroad is a term for foreign countries considered as a collective, and an economy is a system of wealth and resources within a particular country or at the global level as in the world economy.
Explanation:
Physical feature: A physical feature is a characteristic that is tangible, visible, and physically part of a person or a thing. An example of a physical feature for a person is their eye color or their height. In the geographical sense, a physical feature is something that is tangible and apparent on the Earth's surface and formed by nature like a river, mountain, or lake.
Diversity: This is a very broad notion that is applied in a number of fields but at its essence it means variation and difference. It is used in the social sciences to describe multicultural and multiethnic societies. Respect for diversity is understanding that each person is unique and there is more than one way of understanding the world. A multicultural society celebrates cultural and ethnic diversity the term is also used in the biological sciences to describe biological diversity and variation.
Lower 48: This refers to the mainland United States with all states that are below the 48th parallel. However, geographers for example usually recommend against usung this phrase to mean the coterminous United States because Hawaii is actually also below the 48th parallel and actually further south in some parts than Florida which is the southernmost point of the continental US. The other term used is the contiguous United States. This excludes the non-contiguous states like Alaska and Haw
Abroad: This is a very general term used to refer collectively to all the other countries around the world, as in expatriates who live abroad, and companies that establish foreign branches overseas having business installations abroad. The term is also used in financial circles and by the IRS for example who have developed laws for reporting foreign accounts held by United States citizens and taxpayers living abroad.
Economy: The economy refers to the system that circulates wealth and resources within a particular country, or at the level of world commerce and trade. It refers especially to the interchange of goods and services both within particular countries and increasingly there is reference to there being "a world economy" that emphasizes the system of global trade and foreign investment. The most powerful economy in the world is the United States because it is considered the largest economy.
